So it looks like max level stats are already out.
Tiki is 35/36/30/32/24. That's a pretty bonkers Attack stat, but of course Cherche's is higher blah blah blah. 32 Def though... With the Melon Crusher and a +Spd nature, Tiki gets 38 Atk, 35 Spd, 34 Def and 26 Res. Maybe slap Fury or L&D on that? With Fury, the recoil is 8 HP at full health, which isn't as painful as the 11 from Ragnarok. Close Def wtih +Atk/+Def and Quick Riposte would also work.
Robin is 35/32/34/28/29. That's a pretty balanced spread. Compared to Camus, she trades 7 HP and 3 Def for 12 Res, and also has 1 more point of Spd. Unfortunately she doesn't have a Gradivus to carry her, though her weapon does bring her stats up to 34/36/30/31. Mhmmmm.
Gaius' Atk/Spd is 31/37, which is what +Atk Setsuna reaches... So with +Atk, Gaius is 33/37, so Clarisse and Setsuna are already dead. Not much to write home about though. Def Ploy might be great on Kagerou though, if I bother pulling Colorless. Though it'd mean giving up the Hone Spd for Celica.
Fred is...Matthew? 40/32/31/28/18. A lot more Atk than Matthew, that's for sure, but traded some Spd and Def. A bit disappointed. He's not going to run Poison Dagger better than Kagerou any day of the week, and I'm not sure what else is worthwhile with Daggers. At least his Seashell might be better than Silver Dagger kinda.