Final Fantasy X...?

Question

how do i raise my aeons's hp? please help.. i need to know before fighting measter seymour..

Answer 1

Your aeons power increases with yunas. Level up Yuna on the sphere grid and your aeons levels will go up.

After getting the aeons soul from Beldandy(?) from fighting her aeons you can teach them attacks based on the items in your stock.

After beating her in the calm lands you'll be able to level up all your aeons attributes with spheres as you would your team members.