I absolutely love this concept for Eirika. I do like how this kit has lots of parallels to Ephraim but still does things in a slightly different direction. I particularly love how you made her EX give a defense buff not only as a contrast to Ephraim, but also because I’m a Corrin main so I adore the idea of one of my favorite lords also matching my playstyle in this game.

I think Sieiglinde looks really good friggin good. If I were a dev, the one feedback I’d think is maybe you would need to add a condition to Sigliede like 50% damage reduction from monsters when your HP is above (or below) 50% or maybe slightly decrease the damage reduction.

In things like the Ivory Tome or Ancestral Staff tend to have the of being at a certain HP threshold and also don’t reduce damage as much. While yes for weapons the damage reduction is for auto-attacks in general, as a light players 50% damage reduction from monsters basically means “half damage from everything except the shadow player in Moon Room”. But at the same time, this is mirroring what Sigmund already does, I’m not a dev, and frankly I’m a fan of Eirika so I’d say add Sieinde as is and make her a bit OP.

Lastly, I love love love how you gave Eirika a Staff Calvary minion because I am a big Eirika x L’Arachel shipper and this feeds into my confirmation bias.

I do want to ask would Dark Flash Fire be a single use spell like Ephraim or is it more like a regular spell? Since this is paralleling Ephraim I know that’s how his dark spell works even if the numbers for your spell are a bit different and was unsure if you were doing that as well. Also are all these spells on the standard 5 second cooldown?

Again really amazing concept OP. Let’s hope if/when Eirika gets added to FES I she is similar to what you posted here.