For Yvonne's banner

Arknights: Endfield headhunting calculator

A Chartered Headhunting pull is a 6★ 0.8% of the time. From the 66th pull without one, every pull adds 5% to that, and the 80th is always a 6★. Half of them are the featured operator, and 120 pulls on one banner always include Yvonne.

Your odds

OroberylChartered HH PermitsPulls since your last 6★Pulls already made on this bannerYou already pulled Yvonne on this banner

Pulls: 80
Chance of Yvonne: 55.9%
Copies of Yvonne on average: 0.63
Chance of any 6★: 100%

Copies with these pulls

1+55.9%
2+6.3%
3+0.5%
4+0%
5+0%
6 or more0%

Chance of Yvonne by pulls

10 pulls3.9%
30 pulls11.3%
60 pulls21.4%
80 pulls55.9%
120 pulls100%
160 pulls100%
240 pulls100%

From where you are, half of players get Yvonne by pull 73 and 90% by pull 120; pull 120 is certain. 120 pulls cost 60,000 Oroberyl.

How it works out

Pulls since your last 6★ carry over from one Chartered Headhunting banner to the next, so count from your last one even if it came on an older banner. The 120-pull guarantee starts from zero on each banner and only pays out if the featured operator hasn't turned up by then.

Every 240 pulls on a banner also hand out a free copy of its featured operator (their Token), and the copies above include it.

Arsenal issues work the same way with smaller numbers: 10 pulls an issue, a 6★ weapon 4% of the time with no climb, one at the latest every 40 pulls, a quarter of them the featured weapon, and 80 pulls always include it.

The banners page lists every banner and who was on it.