I guess it'll be done tomorrow. It's 1:20 am here so I'm a little tired. But it won't take a lot of time to do. It'll be a lot of copy pasta.
EDIT: Ok, I've modified the interface a little, but I still miss some addresses so tomorrow I'll add the level and stats modifiers for the character's I've already done, and I'll take a little break to find the remaining addresses. I don't know how much time it'll take.
Updated the first post. V 0.3 released. Also, like I said I'll take a little break to find a few more addresses. Actually, I only played through the game once, so I don't have a savegame with Kyouko and Kouin ^^'. And since I'd rather find the addresses myself, I'm gonna play through the game once more to find them.
Thanks for pointing that out. Well, I won't be able to do much about that. It seems like the game uses a strange method to calculate the amount of ether needed to level up. Maybe I'll investigate it when I have everything else done, but not for the moment.
Got a guess on that one actually. I bet that it's the same way some experience systems work such that between 0 and 20 exp you'd be a certain level but beyond 20 would be a level up. Thus when you de-level the character they already have the exp so to say thus it's a 0 cost. I suspect if you took them from 99 to 1 you'd find a 0 cost at every level cause they still held the ether. However this also likely means if you were to trick the game into skipping levels it'd likely cost all that you skipped plus the normal ether to level them up further.