That's fair. Some feedback I got from playtesters were about certain attack patterns (especially Kiara's) being too unforgiving. At the time, it was near deadline, so rather than spend time on fixing aspects like the speed and hitboxes of attacks, I decided to focus on making the rest game playable at least, since I also figured that the player's (Gigi and Ceci's) health pools being so high combined with the fact that the revive action restores so much health would mean that the player can effectively not ever lose as long as they were thinking.
Sandalphon is from Grandblue Fantasy ("GBF"), who also appears in Shadowverse because GBF and Shadowverse are both by Cygames. If you search up "Gigi sandalphon" you can go down that rabbit hole, because one of Gigi's... hyperfixations(?)... is Sandalphon and his story and character dynamics and relationships.