Skill tree gripe.

Very simple and straightforward question.

Why does Kisara require so much more sp to max out her skill tree.? I am at the very end of the game and most characters have about 4 to 6 abilities left that includes Dohalim. Kisara has ELEVEN. Alphen will be pretty close once I defeat all the glowing lights but every one else is maybe 5000 sp away from my sp just being a complete waste as I climb to lvl 99. Unless more skills open up or something but I don't think they do? Last tales game I played was symphonia on gamecube so I don't know if this is a common thing or not.

Edit: all the characters remaining skills are high sp range but ALL of Kisaras 11 skills are too. There is definitely a disproportionate SP required for Kisara compared to the rest.