Something I forgot to mention, but I had Caer in the party for the entire game, as I saw no point taking her out at any point. And with her Oversaturation, she pretty much was self sufficient outside of the fact her damage numbers with her two MP cost skills are pathetic past floor 2. Once she has Aura, that’s the majority of what she does in battle, only using her mana transfer skill out of battle to replenish allies’ MP. Her and Libra are just mainstays for the party since once Libra gets access to her bomb skills she pretty much is a good support for whatever team comp you get. Heck, Caer is pretty much the only reason I was able to get through all of the arena due to her healing, and the only times I struggled was because she got eaten so we lost out on healing, forcing me to play safe when using Yva when she goes super Geep.
Chitrab is the only other character that was a mainstay in the party after we got them, mainly due to the fact he can function even in a magic team due to his mixed attacking, especially once he gets his sugar storm skill since that hits both defense stats for the enemy, softening them up even more when paired with Libra’s expansions.
Of the other party members, Kyra and Ash seem to be the better of the magic side (Kyra having access to Time Warp after the Study and Ash later getting a multi-hit attack along with getting a buff purge spell helps) compared to Nichole and Janine. Now don’t get me wrong, Nichole having access to powerful single target and AoE damage of both physical and magical attributes is fine, but the high MP costs of them, along with her being built to do everything when Caer and more specialized mages exist, kinda paints her in a bad light for now. Janine, meanwhile… doesn’t have enough offensively that doesn’t require the FP meter (also, not being able to see said meter out of combat is annoying), as anything that’s not tied to it is either her AoE, inflicts ballooned (something you wouldn’t want if you’re putting her in a mage team, even though enemies can only have one expansion status on them at a time), or already pierces defense while doing physical damage. She’s more of an alternative to Caer with her many healing skills… without any sort of passive MP upkeep, since at the point you get her, Caer should of already learned Oversaturate.
For the physical damage, Once Yva can go all out she becomes one of the best physical damage dealers, meaning the last slot is split between Tuna-Chan, who has issues in getting the FP needed to use her more powerful skills due to how Hidden locks her out of attacking normally, and Kass, who doesn’t have as much issues since she has Belly Drum to buff her attack and has a skill that does both good damage and gives her FP, but her best skills require a lot of FP to use, so you’ll only see them once a fight.
The only other technical Physical damage dealers are Alexis and Wendy, but both of them are more supports in different ways, and though Alexis can do serious damage with her spider bombs, her expansion serums would work better when paired with Chitrab… but in the late game you don’t want him expanded so he can go first with either sugar storm or dough destroyer to debuff enemies. Her bombs are useful in combat, but again she runs into a similar issue of being a character having their best skills be locked behind FP, something that is hard to remedy even with her ability to use swords. Wendy is pretty good as a buffer, and her Swords Dance gives her an AoE attack for the early game and she gains a pretty useful skill on the 4th floor that restores everyone’s MP and halves their MP costs for 5 turns… which is only useful for tanky boss fights, but still. Her only problem is that in this game stat buffs aren’t as useful as stat debuffs, which Chitrab has access to, along with being able to buff the party and has the ability to remove debuffs as well.
No characters are bad per say, but there are just simply better characters to put in the active party.