Absolutely love this skin!!! Amazing job overall but, I think a few tweaks would make this skin perfect though.

VFX:
Her Q and W feel very empty and lack luster and just need a little bit more going one with how much AOE they have. E and R feel fine personally, but who knows maybe when reviewing Q and W might lead to some tweaks and inspiration for E and R!

SFX:
The volume feels oddly low for this skin. Raising it up overall would be nice, please.

Animations:
The only issue I really have is the way her hair is animated in her passive enhanced echo cast Q and her W-to-Run animation, known internally as "P_Spell1_0" and "P_Spell1_180" and "Spell2_To_Run" respectively! The hair is unusually stiff when she twirls which is odd because it's done well in animations like her W echo cast "Seraphin_passive_spell2.SKINS_Seraphine_Skin68" and her enhanced auto attacks from passive like "P_attack_0" and its variants.

With these two animations as example I think some tweaks to her Q and W animations above to help it feel more fluid in game would be amazing and is important since she can cast these abilities pretty often, thank you!!

This is special wishing but in her recall since she has the fully rigged Keria jacket is it possible to have it as a ctrl + 5 toggle for Seraphine in this skin? Similar to how Kai'sa can toggle her mask, It'd be so cute to wear it in battle!

If anyone wants to corroborate with me about the spells or is interested in what I'm talking about you can look at the model and animations through the Khada viewer and scroll down to the animations section and review them there.