>>712769879Mia is the blandest character dialogue-wise, if you don't count Isaac the self-insert. She pretty much only exists to round out the party in the first game, and there's very little reason for her to accompany the group past Mercury lighthouse except that she thinks the world is in danger. Her background with Alex never really gets leveraged to much effect.
Garet is a little cliche as the hot-headed bro character, but he at least has a personality.
Ivan has the least personality of the boys, but he does have the mysterious backstory with Hama/Contigo going for him along with the optional Hammet/Lunpa arc that revolves around him.
Jenna and Sheba are great. Jenna is meant to be something of an airhead while Sheba is the clever one. Where Jenna is quick to suggest the TLA party gets involved to help people, Sheba is more balanced and tends to be the one catching people in lies (without even reading their minds), and she's also shown to be playful as she pokes fun at Jenna about Isaac and does similar things in other instances.
Piers is the oddball in the second game, as he's supposed to be the calm extra character akin to Mia, but he at least has the "I'm actually 50 years old" thing going on, which is mostly played for humor once revealed.
Felix has great characterization in the first game as the resident bad boy, but is later revealed to be just kind and honorable as Isaac, which is a pretty good twist to pull off with someone acting as a silent protagonist.
I don't think they're all downright amazing characters, but you can DEFINITELY find plenty worse as far as "bland" or "cliche" goes in tons of JRPGs.