Alter Ego Class, decent Max HP at lv. 90, with high damage as well at around 12.5k each without Fous/CEs.
Passives give a 17.5% debuff resist, 10% boost to Crit damage,
QQABB deck with 4-hit Quicks, 3-hit Arts, and 3-hit Busters, and with a 5-hit Extra.
First skill buffs her Quick and Buster cards between 20-30% for 3 turns, so buffing 80% of her normal cards. 6-turn max CD.
Second skill gives 20-30% self NP Charge, 300-500% Crit star absorption, eventual Strengthen in a couple years to boost attack by 10-20%. 6-turn max CD.
Third skill boost NP damage between 20-30% with a 1-time evade that lasts 3 turns. 5-turn max CD.
AoE Buster NP, therefore allowing for a Buster brave chain. 300-500% damage, lowers enemy Buster resistance for 3 turns between 30-50% dependent on Overchage.
Ascensions take Saber and Assassin Pieces/Monuments.
Skills take Saber/Assassin gems, Octuplet Crystals, Ice Crystals, Gallstones and Wine to level, none needed in mass quantities. Worst would be 24 Ice Crystals or 27 Wine for all 3 skills.
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As an Alter Ego, great against Foreigners when they appear, good against Cav classes, shit against Knight classes.
Great hit counts on her cards, and the first skill buffing 4 of the 5 of them for an entire turn reset is a great boost.
Skills have nothing that supports the team, all about her. Focuses on two things: Crits, thanks to her passive and reinforced by her 2nd skill to boost star gather weight; and her NP, with 30% Charge and Damage boosts on her 2nd and 3rd skills.
Honestly, it feels like she's a arriving a bit late to the party for her time in the sun. Buster focus is good, though a certain Green card's time is coming - for those who can build for it.
She's very solid gameplay wise imo, but doesn't massively stand out in any one real category either. Definitely a positive that she's a Crit-focused Servant with an option to also be used for the boost to her NP damage. But if you need AoE damage there's plenty of Berserkers out there that can farm just as well without restrictions on damage against Knight classes. Also, Jeanne Alter is a fair example of a Crit-focused Servant that overshadows her with her skills on that front - along with no damage drop off against anything but Moon Cancers, of which there is currently only one of in NA. She is better than the Dragon Witch at building stars, but likely need a dedicated star-gen Servant to get the most out of her. I guess her one true niche would be to be a Crit-focused Servant to wield against Foreigners, but that's an extremely rare niche right now.
Overall personal grade: B