I actually searched them one by one (well, just all the anti skills), and sadly, Stheno is the only one not counting the Extra classes that hit multiple classes. Tho you could argue Hokusai also counts.

The one funny "exception" is MHX who has anti-saber lol

I'd also argue Siegfried is funny since a lot of Saber faces are Dragon

Abby. I know everyone but Mash has class advantage against Berserkers, but Foreigners are the only true counters to them. She's the only servant with only enough coins for one append I've unlocked the 3rd append for.

I do like the third append skill. At max level they become a half berserker against that class.

Berserkers have +50% effective damage and the append gives up to +30% effective damage, passively. That is why Mordred fights like a mad dog against sabers. Mordred becomes a little bit of a berserker. :p

I only like it sometimes, If the servant has a lot of attack buffs it has far less value because it's additive with attack up/def down. It would be much better and a more viable choice if it added a separate multiplier to the damage formula.

Nah, anti-Berserker is really good. Take Cu and Romulus for example. Cu has 20—50% attack up at his Guts depending on his HP + 30—50% extra attack damage up + 20—30% attack up against Berserker. That means Cu can have 50—80% attack up against Berserker, which is HUGE. Same for Romulus, where excluding his NP, he get up to 46% attack up + 30% Buster up from his skill, 30—50% extra attack damage up, and 20—30% attack up against Berserker, so he can get up to 76% attack up against Berserker.

Anyway, for OP's question, Xu Fu is Alter Ego and have anti-assassin append skill. It can also neutralize her own passive where she get attack down when facing Yu Mei-Ren.

I won't complain that Bakin has "Anti-Foreigner".

It means I don't have to bother with her third append and only will need five copies of her to be her best.

Realistically, when would I actually use Anti-Foreigner (outside of PVP against Izcer)?

Taisui

@WaryWolfy without that skill you will tremble in fear against me, cause of all the fear debuffs.

I don't particularly want to beat up Bunyan and Abby regardless.

Than I'll send my non grailed foreigners and Arash out.