Alright so I just competed the game and wanted to give my thoughts on each of the characters real quick:
Algimas: An overall solid unit, he seemed kinda lacking at times with some poor rng level ups but never failed to pull his own weight. The dude becomes down right broken once he gets his legendary personal weapon. 4/5 stars 5/5 when he gets the personal weapon
Tactician: A dark mage who gets access to healing and brave tomes and support healing later on, this guy does it all. Mine never got spd screwed either so he was able to consistently double things. 5/5 stars
Ernst: The way I feel jaegan characters should be handled. He does his job well but ultimately I feel as though the timing for his usefulness when he starts getting normal exp rates is a little bit too late. By that time there are other characters who are better off. 2/5 stars
Kurtis: He is an okay unit when you get him. However, I feel as though what really holds him back is his speed. He was just too slow to do any meaningful damage. I just had to bench him. 2/5 stars
Haylyn: The first healer that you get. I also tend to staff abuse so that I can get the most mileage out of my units. She was fast and hit decently hard but paper thin defenses. Overall a solid unit but there are some flaws. 4/5 stars
Martel: Never liked brigands so I benched immediately. I feel as though they are a very high risk high reward type of unit which is something that I feel is not good for a long term game like fire emblem. There will always be a bad rng number somewhere and brigands happen to get the worst luck. bias 1/5 stars; potential 3/5 stars if invested into.
Aceline: Hey knights that have access to bows which are stupid broken in this game what could go wrong. How about the fact that she ends up being so slow that not only can she not double but she can't reliably tank either. I wanted her to be good but overall is not worth the time to invest into. 1/5 stars
Boleslav: Since I tried so hard to get Aceline to work I ended up benching Boleslav. That being said archers in this game are really good and boleslav is an amazing unit should you train him. 5/5 stars
Gerwulf: This is a unit who was meant to be the slow but hard hitting unit when you get the two cavaliers. This is fine at the time of his recruitment however the gap widens and eventually he gets outpaced in the amount of damage that he can do and can tank reliably enough to keep him long term. 2/5 stars
Negu: The faster and imo the better of the two cavaliers. She is faster and slightly frailer/weaker however, long term she ends up getting solid defenses and good attack. Mounted mobility is also critical for certain maps and is a great unit overall. 4/5 stars
Sven: The first of the dracoknights that you get in the game. Flying utility is useful and he could be a decent unit. However, he feels like that is all he will be just alright. He has middling speed and attack which just seems to get worse and worse as the game progresses. Maybe if you get rng blessed he can be fantastic but otherwise there are better units out there. 2/5 stars
Beatrice: She is the first mage that you get and will be your only source of magic damage outside of your tactician for the longest time. At first she is a great unit, however, once you start to promote units and have other sources of magic she starts to drop off a bit. She is useable long term but will struggle at times. 3/5 stars
Chiara: Chiara felt very much like a jack of all trades kind of character. she grew nice and evenly and starts with good enough bases that will allow her to do whatever task needs to be done. However, you do have to feed her kills here and there because she can fall behind if you aren't careful. 3/5 stars
Robert: He is a thief that really should be used as a glorified lockpick. He does his job well but overall not worth investing experience into. 2/5 stars
Nilda: Nilda has the opposite problem that Kurtis had. While Kurtis was slow but strong Nilda is fast but weak. At a certain point doubling isn't all that useful if you don't have the strength to make any meaningful damage. 2/5 stars
Wayland: Unpromoted Wayland is an overall meh unit. He could be easily droppable and I would not blame you. However, this character all he needs is just 1 pair of speedwings and he can really get the ball rolling. He becomes an aerial tank once he promotes and is a solid unit overall. Wayland is going to be the best tank you can get in the entire game. 3/5 stars before promotion 5/5 after promotion.
Vlad: A second jaegan character does not interest me what-so-ever. Honestly better off investing experience into Wayland since he can do the same job but get more worth out of it. 1/5 stars
Celia: Celia is the archer goddess. This girl just straight up murders anyone from afar. Boleslav is amazing, so is this girl. She pretty much capped str/spd/skl at level 13-14 promoted. Cannot go wrong in using her. 5/5 stars
Elaine: Healer number 2 except she is on a horse. You might want to invest an angelic robe into her just so that she doesn't die to a stray hit, otherwise she has amazing utility and can deal good damage in a pinch. 4/5 stars
Foskey: Great an armor unit who came in with less speed than my trained Aceline. Benched immediately. 1/5 stars
Lani: The first pegasus flyer you get in the game. She is a great unit and flying utility can help ferry units in certain situations. 4/5 stars
Rorick/Odin: There may be a reason to use Martel if you wanted to train him. These guys have absolutely 0 reason to use. Both are way to underleveled to use reliably. 1/5 stars
Meila: If you are going to use a thief for long term use, Meila should be your choice. She ends up faster so she can steal things a little bit better. However, long term use she fails to secure any meaningful kills. Just have her steal things and give her enough exp to promote so that she can steal all the goodies that you need. 2.5/5 stars
Brendan: He can be an alright unit should you want to make him your primary light magic damage dealer. He is perfectly serviceable but not amazing either. 3/5 stars
Dita: Dita is just a better Gerwulf is every way possible. If you want to use a heavy cavalry unit this is your girl. 3/5 stars
Katarina: Dancers are just always good and she can heal in a pinch as well. 4/5 stars
Aras: Honestly you have the tactician who just outshines Aras in everyway possible. She isn't bad but definitely not good enough to warrant a spot of the team. 2/5 stars
Warren: A promoted general, however, he suffers from the same fate that every other knight had which was poor speed. If you were going to make any general work this would be your best chance but even then he still isn't a good unit. 2/5 stars
Franck: A prepromote who is alright for the chapter he joins and that is about it. If you have a trained Negu, she outclasses Franck in every single stat, he just isn't good enough to use long term 1/5 stars.
Auguste: This is a nino/est archetype done right. She comes in during one of the hardest chapters in the entire game. Enemies are swarming you but if you can feed her kills here and there she will become fantastic. Also one of the best candidates for the afa's drops since she will have the most levels to grow to make the most use out of them. Takes work and effort but will pay off for sure. One of the only units who was able to nearly cap all of her stats. 4.5/5 stars
Danica: She comes it with alright bases and could be extremely useful. A good candidate for an energy ring to bring up damage up to par with the rest of the group. Might take a bit of investment but can definitely be worth it. 3/5 stars
Tanya: The best mage in the game. She can use both light and anima magic but I would recommend focusing on her light magic. Your healers will have most likely capped the stave ranks and if you chose not to use brendan, she is the only reliable way to use high level light magic. Healing utility also makes her a great support unit as well. 4/5 stars.
Cynthia: It could be worse however she is just too slow to become a reliable unit long term. If you really want to use her then you are going to have to spend a speedwings on her but there are other units who could utilize them better. 2/5 stars
Eliana: Starts of okay and manages to maintain her usefulness throughout the game. Not the greatest of units but overall balanced and useable. 3/5 stars
Clara: Might have to rely on drynwyn to get started but once she starts leveling up she becomes a better and better unit. You just have to get over that first little hill to get the ball rolling. 3.5/5 stars
Ayrlyn: Give this girl a killing edge and she will destroy most foes. I ended up not training her and bringing her into the final level. She ended up doing just fine without any training against the endgame enemies. 4/5 stars
Isaac: If you really want to use a beserker, Isaac is your man. Dude comes in with good enough bases to hold you over until the endgame. 3/5 stars
Andrew: The worst of the three archers but still a good unit. Will definitely be weaker than both of the other archers if they are trained and probably not worth having 3 archers on your team. 3/5 stars
Dione: For a secret unit that you have to go through a whole lot to get, not really worth the investment. She is an alright unit and can be used in the endgame but she could be a lot better. 3/5 stars
Erwin: 16 magic with only 2 levels to grow means that he might struggle a bit. He does have amazing growth rates but overall should only be used if you have other units that died or are heavily rng screwed. 3/5 stars.