It’s never going to happen, since it’s completely outside of the Nasuverse, but I will keep on wishing: Umineko No Naku Koro Ni crossover with Avenger Beatrice It’s really late here where I am but there’s a bunch of potential characters that could work as Servants. I’ll keep it to Beatrice simply because Sayaka Ohara. And she’s great.
Too tired to add stats and name and the like, but she’d most likely be a 5*
It makes sense due to, keeping it spoiler-free, she’s looking to take back what’s hers with extraordinary interest from the Ushiromiya family. Revenge, in a way. She’s sane enough to be an Avenger as opposed to a Berserker. No way the Golden witch would be a Ruler. No other class fits her better.
NP: The Witch's Epitaph.
I’m thinking there could be a new trait implemented in the game, similar to “Weak to Enuma Elish” or “Brynhildr’s Beloved”, where Gil and Bryn deal bonus damage against Servants with this trait. The new trait could be something like “Unworthy of the Golden Land” or similar. Basically, Beatrice would consider some Servants completely unworthy of stepping foot inside the Land of the Golden Witch and deal bonus damage against them. Not sure who these Servants could be, but let’s just assume it’s a bunch of Servants similar to WtEA. Not as many, that’d be too broken. But a few Beatrice just considers unworthy. This isn’t going to happen, I’m not going to think that much. Anyway:
The Witch’s Epitaph. Removes an enemy’s defensive buffs (Defense up, evade, invulnerable) (Activates first). Deal significant damage against a single enemy (scales with level). Deal extra damage against enemies with [Unworthy of the Golden Land] trait (scales with overcharge).
The buff removal makes sense since nothing can stop the Golden Witch. Sure, buff removal resistance, but that’s fgo mechanics. Stripping a character out of any defensive buff seems like a very Beatrice thing to do, anyway.
Exclusive Skill: Golden Butterfly Protection
Increase Defense (3 turns) by 30%-60% + apply Defense against [Unworthy of the Golden Land] enemies by 40%-50% (2 times, 3 turns).
Not completely overpowered, but if rng and skills stacked allowed it, Beatrice would become untouchable by an enemy with so many defesne buffs. The extra Defense applies only for two hits, but added to the first Defense buff it’s higher than 100% def bonus, so basically untouchable for at least 2 hits (unless pierce defense).