Since I like fire emblem games I want to make a tier list of the units available as of 0.2
Argo-8/10, With test buster 11/10
PROS: He's your lord, Has high defense, Perfect availability,
CONS: low movement, no combat abilities
Argo is your lord and he's very good in the early game but after chapter 4 some issues are apparent, especially the mage chapter where his average defense gets him shredded in that specific chapter and he can't double. He also has lower movement then the rest of your army. Despite this his bulk helps in other maps.
Safy-10/10
PROS: Healer, Solid attacker, Miracle cheese, perfect availability
CONS: Average defense?
Your healer but unlike most healers in fire emblem she can actually attack, I'd consider her a perfect unit because she can fight, heal and possibly cheese with miracle, and there's an event where she can gain more range when healing so it just improves her support capabilities
Lyla-5/10
PROS:High attack, bargain
CONS:Slow, frail
She's supposed to be a strong unit with high attack but with the exception of her joining chapter she usually doesn't have the speed to double or the capability to take attacks. She has an event where she gets bargain so atleast she's good for shopping.
Viske-9/10
PROS: High attack, High speed, Skill with crit
CONS: Low defense
She is probably the best combat unit so far, Her High attack and speed let's her double and kill everything in a fight and if she can't she has a skill that just lets her crit her way through. Her only con is that she has low defense so you can't just throw her into a horde of enemies, despite this she is the best boss killer in the game and has oddly high resistance which let her deal with mages surprisingly well. She has an event where if you heavily out speed your opponent you just double immediately
(unfortunately when you do get it the game ends)
Eclair-8/10
PROS: Great promotion, Fast
CONS: mediocre skill, Average defense
Eclair is great, at first she might be mediocre but with some level ups she can gain a lot of speed and magic which lets her easily defeat enemies. Her skill is kind of mediocre though with having a chance to just have her attack hit. her promotion is the best part about her as she gains a horse while the others get some stat boosts with no major buff outside of that.
(I actually don't know if Safy has an insane promotion because she's level 9 so sorry X()
Xernia-10/10
PROS: Good bulk, Good magic, Good speed
CONS: mediocre skill,
Your first pre-promote and she's amazing, she can do everything with her high stats and healing. Only con is that her ability just ignores status effects, which is a non factor. Amazing unit
Reese-NEW/10
PROS: Horse, vantage
You only get to use her for 1 chapter but so far she has a good impression, Having a horse is great and vantage can be a useful ability if you can utilize it
Katrielle-NEW/10
Pros:Insane Bow, Mobile skill
She has a personal weapon where it's magical and gives +10 in magic, she is also unaffected by any terrain penalties so she seems to be already insane with only being able to used in 1 bonus chapter
Here's my tierlist, since I don't know the character's average stats these are from my own personal run and my own opinons feel free to disagree.