isabelle is one of them. i currently got one at lv39 and about 60k power i think
trying to farm her shards, but i'm stuck doing the 18 stam fight for now (which seems to drop a shard about 60-75% of the time)
aslo, by "new 2star girls" you mean the fire one with the twintails? i kinda want her cause of her looks and i do need a fire melee character (it's honestly best to get one of each type and element at most cause leveling and such is a major pain... MORE than Kanpani Girls if you ever played that)
this seems to happen to me a lot too
i'm curious about this myself cause farming books seems like a slow and painful process.... going for 3* shards (currently the isabelle missions) can give quite a few but the elemental missions seems somewhat decent for getting specific element books. even then, i'm getting roughly 1-2 level ups a day for anyone that's lv25+ considering i can only play the game for about 2-4 hours tops
i think you can get some from gacha, but that's for spenders or those that can net a lot of friend points and gacha tickets