Helmeppo: HP: 770. ATK: 485. RCV: 130 Rank: 3/10 Special: Enemies have 0 defense. He can reduce enemy defense to 0 which can be nice. Not nice enough to make up for his lame stats.
X Drake: HP: 3580. ATK: 1098 RCV: 132 Rank: 7/10 Special: If above 50% HP, then you survive next turn. He has very nice stats and his special keeps you alive, but it isn't that helpful.
Robin: HP: 1865. ATK: 1055. RCV: 338 Rank: 6.5/10 Special: 2X INT boost. Her stats are nice enough. Her special can boost INT. On a Fighter team it won't do much, but it's something.
Rayleigh: HP: 3001. ATK: 1300. RCV: 500 Rank: 9.5/10 Special: 20X damage to all enemies. Reduce lock by 5. His special breaks locked characters which is only useful in some situations. His stats are great though.
Brain Point Chopper: HP: 520. ATK: 454. RCV: 302 Rank: 1.5/10 Special: Neighboring slots into meat. He can make food and nothing else. I don't really know why Fighter teams need food though.
Hogback: HP: 2741. ATK: 945. RCV: 189 Rank: 7.5/10 Special: 1.25X Figher boost and 50% damage reduction for 1 turn. He boosts Fighters, so he's great for Fighters; however, it's only 1.25X. His stats are decent and he makes the most since on a Fighter Team at this point.