Siegfried- One of the main characters, and he's overall an incredible asset. He levels up fairly fast and has his own mode to grow. Siegfried's amazing growths, pony, and access to Nothung makes him one of the best characters, if not the best, you have until he leaves.
Shon- Unfortunately, it looks like Shon didn't inherit anything good from his father. His bases are terrible, which really hurts him in the long run. From my experience, he has good Skill, and that's about it. Shon's Strength is atrocious, and Speed is middling. After he promotes and gets Silvans, Shon becomes enormously better, but still isn't up to par with a lot of the cast.
Corben- I wasn't impressed with Corben. He works decent enough in Siegfried's mode, but lack of Speed hurts him a lot. He does have 10 Con and high Luck though; nice assets. I dumped him shortly after getting him back.
Tamiko- Fast-growing staffbot, she'll easily be the first character to promote. Her durability and decent Speed makes Tamiko a great asset for the early Anakin mode chapters. Her combat utility declines later though, due to her fairly low AS. Tamiko's healing and early offense makes her one of the best, and she's easily the prettiest character!

Shuuda- This Mercenary's excellent bases makes him extremely easy to fit into any team; he starts one-rounding virtually everything. Shuuda's growths are extremely lopsided, growing very fast offensively, but having poor durability. Throw him an Angelic Robe, and he becomes unstoppable.
Inanna- A cute flybot. Once supports are implemented she'll become a lot better, but for now, she's too weak and fragile to use very effectively.
Kevin- Unlike the main Fire Emblem games, Kevin is a complete monster. He makes the best use of the Speedwing in Siegfried's mode and the Boots. Kevin's Defense is lower than his contemporaries, but still high enough to be virtually invincible. He's essential to get through the first several chapters of Anakin's mode.
Arthur- He's a loser. Arthur can barely do chip damage on his joining chapter. There's nothing redeeming about this failure.
Storm- Storm is really helpful for Siegfried's route, and his Storm Bringer bow is nice. However, he rejoins too late to be of much use.
Althares- Theif utility isn't very useful in this game. However, his 15% Critical boost helps him offensively, and leveling him up is a good idea for Anakin's mode. I threw him an Angelic Robe in Siegfried's mode, making him a very nice unit for those first few chapters of Anakin's mode.
Cia- Like Kevin, but better. Her durability issues are fixed in Siegfried's mode due to buyable Angelic Robes and she one-rounds everything. She's incredible, and will only become better once supports are implemented. Cia makes the hardest parts of the game far easier to deal with.
Noah- He's a great asset in Siegfried's mode. I forgot to recruit him in Anakin's mode, so I can't say anything about that.
Haas- Monstrous while he's around in Siegfried's mode. Unfortunately, his bases aren't competative on being re-recruited; 15 Speed is just too slow.
Anakin- Dancebot, Staffbot, and decent offense. His early promotion is actually an asset, because of the Movement gain and Staff access. He's the perfect utility unit.
Ace- His bases are alright. I think I got RNG-screwed with him, because he never did grow much. I had to ditch him and replaced him with Rex.
Eduardo- 30 HP is really nice, and that's about it. Eduardo's unique Charge Lance could be a nice asset, but his low accuracy makes him unreliable.
Karina- As Nayr's replacement, she's supposed to play a similar role as a high-base powerhouse. Unfortunately, the enemies are a lot stronger than previous versions, so Karina is not nearly as powerful as her predecessor. I miss Nayr.
Kelik- Honestly, I wasn't impressed with Kelik; probably a result of bad RNG. His durability is poor early on, and after promotion, his AS is just shy of doubling. He's okay, nothing really exceptional.
Logan- His 20 base HP makes Logan virtually unusuable, which makes me very unhappy.
Itsuke- I didn't use him much, but he seems pretty cool. Itsuke's offense and decent AS helps a lot as a filler character in the early chapters. He's probably really good, but I just didn't use him much.
Zach- He has a cool HP base, but I didn't bother with him.
Lirin- Didn't use her. She seems like a loser.
Tekun- I must have been severely screwed with Tekun. This guy's bases are atrocious, and his AS sucks. I really hope mine was just a victim of the RNG, because Takun is really bad.
Emma- Her Luck sucks; mine has 4 at level 20/12! Like Tamiko, she's a great Staffbot. Her offense is mediocre on promotion, but high Movement and Defense makes her an exceptional healer.
Ben- He's Karina with high Resistance. Ben and Emma are obviously incestuous, which is a plus, but not to actually warrant using him. Though once supports are added...

Mark- He's some random-ass Pirate with decent bases. I didn't use him.
Lyam- This guy's high bases makes him a great filler character. Unfortunately, he grows extremely slowly; the worst EXP gains in the game! His utility doesn't really falter too much; Lyam's A rank in Sword and Bow makes him a very helpful filler character.
Rex- Ace, but faster and with low Skill. I'm not impressed.
Howard- He's a really solid character. Howard's bases are pretty impressive, with just enough base Speed to double most enemies, and he cap-rams it fast. His low Skill is a problem, but it isn't too big of a deal. Howard's a very good character on join, easily the best Paladin out of the four.
Yue- I promoted him immediately, but his bases don't really carry him far. He's helpful on his joining chapter, but Rana's better.
Sai- Why does this guy exist.
Levion- This guy's bases look incredible. Unfortunately, he's lacking in Speed, severely hampering his offense. Out of the two prepromote Paladins, he's the defensive one, while Howard is better offensively. I used both, but while Levion is pretty good, he was still a bit disappointing.
Liquid- His bases are just too low to be of much use.
Risk- Filler Swordmaster, nothing more.
Leopold- 22 base Defense is nice. His B weapon ranks are disappointing, as is having an AS just shy of doubling. Still, Leopold makes a decent filler flyer.
Shadow- Late-game door-opener and good Speed. Not much else to say about him.
Rana- Better than Yue. He's slow, but has nice weapon ranks. Not much to say about him.
Alice- I didn't use her at all. She seems okay, I guess.
Gary- GARY MUTHAF**KING WARRIOR! His stats are monstrous!
Frederick- Capped Defense is nice, but he can't do much of anything with 5 Movement and all the magic-users in the upcoming chapter.
Rachel- I really don't see what people have against her. Her base stats are passable, and S Bows makes her a viable filler for the final chapter.
And that's all, so far! So, what were your experiences?