

The The Hunt
Dr. Ratio
/
Imaginary/★★★★★
Intelligentsia Guild
Introduction
Dr. Ratio is a 5-star Imaginary character in Honkai: Star Rail. Dr. Ratio's path is The Hunt. Faction: Intelligentsia Guild.
On our Honkai: Star Rail tier list Dr. Ratio is B tier, 62nd of the 87 characters ranked, from where 18 current tier lists put Dr. Ratio.
By game mode, Dr. Ratio is B in Memory of Chaos, D in Pure Fiction and B in Apocalyptic Shadow.
Other Imaginary characters in Honkai: Star Rail: Aventurine, Dan Heng • Imbibitor Lunae, Luocha, Mydei, Rappa, Silver Wolf LV.999 and 3 more.
Is Dr. Ratio good?
Dr. Ratio is an
Imaginary single-target damage dealer, once given free to everyone, who fights through follow-ups and builds permanent CRIT buffs during combat. Attacking debuffed enemies powers him: 3 debuffs guarantee his follow-up and each debuff adds damage up to 5, so a debuff-heavy team is essential.
His follow-ups deal good Toughness damage and his Traces make CRIT easy to build, but his multipliers trail version 3 units, his Ultimate is expensive and he's still mainly single-target.
Strengths
- Strong single-target damage
- High Toughness damage from follow-ups
- Many good relic options
- CRIT is easy to build
Weaknesses
- Lower multipliers than newer units
- Expensive Ultimate
- Needs 3 debuffs on the target for consistent follow-ups
- Mostly single-target
Best build for Dr. Ratio
From 4 guidesLight cone
4 options- 14 of 4
- 23 of 4
- 33 of 4
- 42 of 4
Main stats
- Body
- CRIT Rate
/CRIT DMG - Feet
- SPD
/ATK% - Planar Sphere
- Imaginary DMG Boost
/ATK% - Link Rope
- ATK%
- Substats
- CRIT DMG
=CRIT Rate >SPD >ATK%
Relic set
2 options- 14 of 4
Pioneer Diver of Dead Waters(4) - 23 of 4
Wastelander of Banditry Desert(4)
Planar ornament
4 options- 14 of 4
Duran, Dynasty of Running Wolves(2) - 23 of 4
Izumo Gensei and Takama Divine Realm(2)
Show 2 more set optionsShow fewer
- 32 of 4
Firmament Frontline: Glamoth(2) - 42 of 4
Inert Salsotto(2)
Best team
With 3 teammatesProfile
Dr. Ratio's full name is Veritas Ratio. Dr. Ratio is voiced by Sang Yuze (桑毓泽) in Chinese, Jordan Paul Haro in English, Takeuchi Shunsuke (武内駿輔) in Japanese, and Lee Donghoon (이동훈) in Korean.
Background
Member of the Intelligentsia Guild.
Eccentric temperament, sharp-tongued but with an elegant demeanor.
The face under the strange alabaster head sculpture is apparently unexpectedly handsome.
Stories
5Story 1
A candid and self-assured Intelligentsia Guild member, who often conceals his appearance with a strange plaster sculpture.
He demonstrated unparalleled intelligence and talent since his youth, but now refers to himself as a "Mundanite."
Firmly believing that intellect and creativity are not confined to geniuses, he seeks to distribute knowledge to the entire universe to cure the persistent disease named ignorance.
Story 2
Veritas Ratio, who calls himself "Dr. Ratio," is as contentious as his research. In Ratio's homeworld, there are no less than eight documentaries detailing his legendary exploits, and over a dozen memoirs about him. However, despite the plethora of commentaries, none of them seems to provide a compelling perspective. To fill this void, I personally visited Professor Rond, who had a significant influence on Ratio's upbringing. Though advanced in years and unable to speak coherently, Professor Rond couldn't contain his excitement at the mention of Ratio's name. With the help of his family and students, I obtained a yellowed yet remarkably well-preserved letter of recommendation.
"To the respected admission committee of the University of Veritas Prime:
I am Rond, Professor Emeritus of the Department of Mathematics at the Cosmos Liberty University. Given your institution's reputation for valuing talents and education, I would like to recommend a student named Ratio to advance his studies at your university. Although Ratio is a secondary school student at the moment, his mastery of math, physics, and even philosophy has far exceeded the requirements for an undergraduate degree in many universities.
While he was under my tutelage, Ratio managed to solve complicated mathematical equations at an unexpectedly staggering speed. The undergraduates in my class struggled to even comprehend the concepts. Out of curiosity, I shared a manuscript about an equation named Rond's Conjecture in private. Although I'm the one who proposed the equation, I've been unable to prove it. After days of discussion, Ratio came up with a brilliant and stunning idea that managed to finally prove the equation in one strike. The paper will be published shortly, and you will see that I am speaking the truth.
Ratio showed remarkable perception, curiosity, and creativity during the time we spent together. He wakes up early every morning to exercise before diving straight into the sea of knowledge afterward. Perhaps, he is exactly what everyone would picture a genius to be — passionate, profound, fervent, and inherently dominating.
Due to the lack of more advanced science programs at local schools, I sincerely hope that your esteemed institution will accept Ratio's enrollment. I can vouch for him on my reputation that he will definitely achieve accomplishments that transcend this era and bring glory to your widely-renowned institution.
Best wishes,
Rond
██ ██ ██, Philosopher Calendar"
Extracted from page 9, Wisdom as a Privilege: Decoding Dr. Ratio
Story 3
After acquiring his eighth doctoral degree, Ratio was awarded the First Class Honors Degree that had been left vacant for two Amber Eras in the University of Veritas Prime. Even many years later, this achievement remained unparalleled in the history of the university and was likely to remain unmatched for generations to come. At that time, Ratio was already a prominent figure in society, but there were varying opinions about him among his teachers and peers. This is the electronic copy of some valuable information I gathered:
Campus Highlights:
1. #FirstClassHonorsDegreeAwardedToVeritasRatio
Views (2500), Comments (145)
Details:
The First Class Honors Degree of our university that has been vacant for two Amber Eras will soon be awarded to Veritas Ratio in recognition of his outstanding achievements in the fields of biology, medicine, natural theology, philosophy, mathematics, physics, engineering, etc. Given his remarkable contribution to the subject of energy sources on this planet, Veritas Ratio will be granted direct eligibility for teaching.
Professor Velita, Department of Mathematics:
Congratulations to Ratio! He deserves all the glory for his diligence and intelligence! Do you still remember how he put on a headgear to keep away all external distractions and completely focus on thinking? Who else in the world could manage that? Although Ratio was my student for some time, I'm afraid I actually learned more from him than what I taught him. Ratio was a breath of fresh air at the University of Veritas Prime with his honesty and straightforwardness. We should all be grateful to him!
Agree (1000+), Disagree (2)
Philosophy_Delinquent:
Shouldn't he be a member of the Genius Society already?
Agree (850), Disagree (5)
Physics_Is_Beautiful:
Rumor has it that some congressman's son attended a class where Ratio was the TA. The guy tossed some cash on Ratio, trying to bribe him for a pass. Ratio came down hard on the guy and threw him out of the classroom. That's right — he literally THREW him... What a god among men.
Agree (550), Disagree (112)
BearMarket_Loser
I once went to a class where he was the TA and couldn't wrap my head around what he was saying. I held on to the end and scored 0. I count myself lucky that my score wasn't negative...
Agree (448), Disagree (37)
Cosmos_Walker
Give me a like if you've ever cried because of his scolding!
Agree (330), Disagree (110)
BoredomKillledTheCat
Is it true that he showers with his headgear on?
Agree (220), Disagree (10)
Follow-My-Lead
He's not that great, is he? I can do the same if I just work harder...
Agree (1), Disagree (1000)
You might like:
2. #The8thDoctoralDegreeAwardedToRatio
3. #RatioFeaturedInCollegeTextbooks
4. #IsVeritasRatioCrazy
According to statistics, Ratio has taught 52 courses during his tenure. The courses, known to be harsh and challenging, have a completion rate of no more than 3%. Almost all the students who made it to the end have become experts in certain fields.
Extracted from page 82, Wisdom as a Privilege: Decoding Dr. Ratio
Story 4
It is widely speculated that Ratio aspires to join the Genius Society, though he has never spoken about the subject. No matter how amazing Ratio's accomplishments are in the eyes of the ordinary folks, Nous has never batted an eye at him. This issue has become a much-discussed mystery in the academic community over time. I reached out to Margaret, a former assistant of Ratio, and gathered some valuable testimony from her.
"Mr. Ratio has never talked about the Genius Society with me, but there's something I remember well, even till today... It happened when I was still Mr. Ratio's academic assistant. I'm mainly responsible for managing his correspondences to and from all over the cosmos and handling his interactions with the outside world."
"One day, I received a letter from Interastral Peace Corporation. I think... it was during the successful test-firing of the anti-planetary weapon Mr. Ratio had worked on for years. I could tell the solemnity of the invitation, so I excitedly passed it on to Mr. Ratio. Yet, he said nothing. I could sense his heavy silence even through the headgear. He then politely asked me to leave. The moment I closed the door, I heard a grim sigh followed by a self-deprecating laughter... Perhaps, he realized he would never be accepted into the Genius Society..."
"The rest is history. In my view, Mr. Ratio is a genius in the truest sense of the word, as his inventions have propelled many worlds forward. Is a scholar who heals the universe destined to be worth less than a genius who is confined to their own ivory tower? Sorry, I'm getting a little worked up. Please remove that statement."
From my observation, many of Dr. Ratio's supporters feel sorry for him like Margaret. In their opinion, the Society's failure to admit someone like Ratio is a manifestation of the eccentricity and narrow-mindedness of "geniuses."
Extracted from page 150, Wisdom as a Privilege: Decoding Dr. Ratio
Story 5
Many believe that after joining the Intelligentsia Guild, Ratio will learn to smooth out his sharp personality to adapt to the Guild's practical and simplistic academic environment. But I must say Ratio is still his old self. Below is the original excerpt from the internal records that I have transcribed:
Respondent: Veritas Ratio
Subject: Logical Epistemology
Chairman of the Committee: Roseth
Transcriber: Morriway
Defense Transcript:
Roseth: Mr. Ratio, your paper is exceptional. Thank you for your presentation. Now, we will open the floor for questions.
There was a silence.
Roseth: Well, I'll do the honor then.
Roseth: I fully concur with your main ideas, but there's a detail that I find slightly confusing.
Veritas Ratio: Whenever someone agrees with me, I feel like I must be wrong.
Roseth: My question is, why do you think knowledge is a privilege?
Veritas Ratio: Dear Professor Roseth, your question indicates that you haven't fully grasped the content of my paper and do not understand the deductive methods I employed.
Veritas Ratio: To put it simply, you would be a great example. Your inability to comprehend my ideas shows precisely that knowledge is not for everyone.
Veritas Ratio: If ignorance is an ailment, it is the duty of scholars to weed it out and heal the universe.
Veritas Ratio walked to the podium, facing the crowd. Veritas Ratio: So, ladies and gentlemen, turning a blind eye to the folly of others is not an etiquette, but a wicked worldly practice. To spread knowledge, we must first make people realize their folly. The same surely applies to the scholars of the Guild.
Roseth shrugged and smiled bitterly.
Veritas Ratio left amid the commotion.
Remark: A passionate hand holding an icy sword — that is probably the best way to describe Mr. Veritas Ratio. By blending logic, passion, and the art of criticism into one, Ratio presents to us how a great thinker perceives and reacts to ignorance. We strongly believe that the addition of Mr. Veritas Ratio will bring immeasurable benefits to the Intelligentsia Guild.
Committee Decision: Approved unanimously.
There are words about a mysterious organization within the Intelligentsia Guild called the "Council of Mundanites" that houses the brightest minds of the Guild. The fact that Ratio calls himself a Mundanite seems to affirm the rumor. It is hard not to read something into the organization's name, given Ratio's entangled history with the Genius Society. The mundane, as opposed to the ingenious, often has to make enormous efforts and sacrifices just to catch up with the latter. Is Ratio calling himself mundane a form of submission, mockery, or declaration of war? Anyway, he does live up to his name of Dr. Ratio with his dedication to curing ill minds with knowledge.
Extracted from page 230, Wisdom as a Privilege: Decoding Dr. Ratio
Stats
- HP1,048
- ATK776
- DEF461
- SPD103
- Taunt75
Level 80. Each bar is measured against the highest value in the Honkai: Star Rail roster.
Skills
14Mind is Might
Basic ATKDeals Imaginary DMG equal to 100% of Dr. Ratio's ATK to one designated enemy target.
Intellectual Midwifery
SkillDeals Imaginary DMG equal to 150% of Dr. Ratio's ATK to one designated enemy target.
Syllogistic Paradox
UltimateDeals Imaginary DMG equal to 240% of Dr. Ratio's ATK to one designated enemy target and applies "Wiseman's Folly." When Dr. Ratio's teammates attack a target afflicted with "Wiseman's Folly," Dr. Ratio launches 1 instance of his Talent's Follow-Up ATK against this target. "Wiseman's Folly" can be triggered for up to 2 times and only affects the most recent target of Dr. Ratio's Ultimate. This trigger count resets after Dr. Ratio's Ultimate is used.
Cogito, Ergo Sum
TalentWhen using his Skill, Dr. Ratio has a 40% fixed chance of launching a Follow-Up ATK against his target for 1 time, dealing Imaginary DMG equal to 270% of Dr. Ratio's ATK. For each debuff the target enemy has, the fixed chance of launching Follow-Up ATK increases by 20%. If the target enemy is defeated before the Follow-Up ATK triggers, the Follow-Up ATK will be directed at a single random enemy instead.
Mold of Idolatry
TechniqueAfter using Technique, creates a Special Dimension that Taunts nearby enemies, lasting for 10 second(s). After entering battle with enemies in this Special Dimension, there is a 100% base chance to reduce each single enemy target's SPD by 15% for 2 turn(s). Only 1 Dimension Effect created by allies can exist at the same time.
Summation
TraceWhen Dr. Ratio uses his Skill, for every debuff on the target, his CRIT Rate increases by 2.5% and CRIT DMG by 5%. This effect can stack up to 6 time(s).
Inference
TraceWhen Skill is used to attack an enemy target, there is a 100% base chance to reduce the attacked enemy target's Effect RES by 10% for 2 turn(s).
Deduction
TraceWhen dealing DMG to a target that has 3 or more debuff(s), for each debuff the target has, the DMG dealt by Dr. Ratio to this target increases by 10%, up to a maximum increase of 50%.
Pride Comes Before a Fall
Eidolon 1The maximum stackable count for the Trace "Summation" increases by 4. When a battle begins, immediately obtains 4 stacks of Summation. Needs to unlock Summation first.
The Divine Is in the Details
Eidolon 2When his Talent's Follow-Up ATK hits a target, for every debuff the target has, deals Imaginary Additional DMG equal to 20% of Dr. Ratio's ATK. This effect can be triggered for a maximum of 4 time(s) during each Follow-Up ATK.
Know Thyself
Eidolon 3Ultimate Lv. +2, up to a maximum of Lv. 15. Basic ATK Lv. +1, up to a maximum of Lv. 10.
Ignorance Is Blight
Eidolon 4When triggering the Talent, additionally regenerates 15 Energy for Dr. Ratio.
Sic Itur Ad Astra
Eidolon 5Skill Lv. +2, up to a maximum of Lv. 15. Talent Lv. +2, up to a maximum of Lv. 15.
Vincit Omnia Veritas
Eidolon 6Additionally increases the trigger count for "Wiseman's Folly" by 1. The DMG dealt by the Talent's Follow-Up ATK increases by 50%.
How to get Dr. Ratio
Event Warp - Proposal from Dr. Ratio (Version 1.6 "Panta Rhei" through Version 2.1, expired)
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