What is your favorite Red, Blue, Green, and Colorless Unit?

Shoutout to the positivity post!

Red - Soleil. Bae is a great unit, fun character and available at 4 stars.
EDIT: ALSO Sword Lucina. Her refinement made her insanely more viable and she is an absolute terror still to this day. If only she was a liiiiittle more available.
Blue - Brave Lucina. One of the best support units in the game, and pretty fast for a lancer. She and Soleil are part of my arena core.
Green - Partial to LA Hector. His crit lines are just too much fun.
Colorless - Priscilla. Just because she's my only Troubadour healer. And WoM has made her so valuable in training modes. : D

Just my favs. Your's, Cane?

Blue: Charlotte, easily. Don't ask me why, I'm just dumb and have a stupid affinity for her. Must be the dress...or the giantfuckinspoon.

Red: Probably Katarina. She's bae, and also lowkey adorable. Her sprite is adorable... and it helps that she's my MVP Red. Carried me through a ton of shit, and is basically my own version of Nino.

Green: Henry, I guess. I like him, and also really like his design. Helps that he's really good, and is a far bulkier version of Nino.

Colourless: At this point, probably Faye. Used to be Clarisse, somewhat, but I've neglected her for a long time. Quad snipers are really fun, but I can't help but really enjoy the mixed tank breed I made of the former.

red-Morgan

Blue-shiro

Green-Gerome/Axezura

Colorless-B lyn

Red; Probably Olivia. I like the character and she's suuuuuper useful.
Blue; M.Robin, though too bad he's not very good. But then they also made W!Robin! And he's pretty great.
Green; Dierdre, because her art is utterly fantastic.
Colorless; Genny, because she's my pet project and she's carried my teams through nearly everything.

Interesting! I'll keep it to units I have, so no Ayra or Mia as I really enjoy them from the main series but have not summoned them.

Red: Fir, she's by far my favorite FE6 character. And she was the mvp of my first playthrough of FE6. And I have a bias toward liking female swordmasters.

Blue: Nephenee, as she's in my favorite FE game of all time, Radiant Dawn. And like Fir, she's been an mvp of one of my playthroughs before.

Green: Amelia, I always remember liking using her in SS. But she's probably been the most fun character to use in Heroes as with a +Spd IV she can hit some crazy good speed for an armor unit. And Armor March is so nice for helping out my other armor units.

Colorless: Lachesis, I've invested pretty heavily in making her my go to healer: Dazzling Fear+/Physic+/Miracle/Attack+3/Wrathful Staff 3/ Savage Blow 3. And with her +Atk IV she easily hits 50 Atk even unmerged. Amelia has been my most fun character to use in heroes, but Lachesis has been my most fun character to build in heroes.

Caeda-versatile and fun

Machaia- res tank and wallbreaker with desp BA

Raven- hes op

Hsakura- dont have that many colorless but she cute

Well anyone who knows me will know the green one is obvious lol so here goes...

Red - favourite unit to use is actually Sanaki, I just enjoy playing her in my teams. She’s +7 right now and has dangerous attack when she next to a flier due to her weapon upgrade aaaaand I put atk/res bond on her from a -atk NY Takumi I didn’t plan to use. Zelgius is a close 2nd.
Blue - Micaiah,,if I could get enough to reach +10 she’d instantly be in my core team. 2nd Ninian, 3rd Lukas.
Green - the imperious Brave Ike. He’s a defensive monster and in some ways better than his sword weilding counter part. Also my summoner support. 2nd P!Azura.
Colourless - Genny, she didn’t used to be on my favourites list until the staffs upgraded and now I love her, she’s awesome. Close 2nd Jeorge, 3rd Klein - 2 of my original heroes.

red: L!Ike - an F2P godsend, and my husband
blue: Ephraim +hp -res don't mean a thing when you've got Heavy Blade, Death Blow, QR and Aether.

S!Corrin is also becoming my 2nd favorite - she nukes EVERYTHING with blarblade.

green: Sheena. the ultimate tank.

colorless: Brave Lyn ;) ain't nobody gonna beat that meta queen. And she's so helpful in clearing PvE content. Plus Lyn is my favorite character in all of FE, and I have yet to summon the normal one.

I’m going to run your question a bit more in-depth.

Infantry

Red: I know you said not the best, but my favorite to use is Ayra. She was my first true “stalker” unit, coming home on 4 occasions. I absolutely love using her, and she was/is a lifesaver in many PvE formats for me.
Blue: Fjorm. She’s been a really fun unit to use, and with minimal investment is a strong addition to any team I use. She’s a mainstay in my arena teams.
Green: Brave Ike. He’s my unofficial axe stalker, having come home 4 times, and is a very strong and reliable unit capable of turning any matchup in his favor. Seeing a certain max merged Brave Ike has motivated me to build him in that likeness.
Colorless: Takumi. He was my first archer in this game, and he still is a unit I like using to help clear out meta archers such as Brave Lyn and Bridal Cordelia. Bowbreaker gave him a solid niche.

Armor units

Red: Zelgius. I recently got him, and love using him. He needs little to no investment for me to reliably use him to his fullest capacity, and warp powder is a skill that is screwy, and I like gimmicky/screwy skills.
Blue: Effie. I have loved using her since I decided to build her up. A strong presence on the field, and good enough to destroy any enemy that tries to fight her. She is the guardian of my armor team, as she protects everyone.
Green: Hector has always been my main man since the day I nonfocus summoned him. Getting him was the reason I initially created an armor emblem team, and he opened a whole new realm of play for me.
Colorless: never pulled a colorless armor unit, and there’s currently only one out.

Fliers

Red: Caeda. She was a unit I had collecting dust because I had Elincia, but her refinement made her go from forgotten to perfect killer overnight. I have used her to solo armor teams, and she is capable of doing the same against horse emblem. She was my original red flier, but Elincia took her spot until IS gave her a boost.
Blue: Cordelia. Awakening waifu turned FEH badass. Enough said.
Green: Michalis. My main man in this game. He is a unit I will always use because I feel like he is an icon for my friends on here. Just ask any of them. Lol
Colorless: Kagero will be the first and only as of now.

Cavalry

Red: Xander. He was my first red horse unit, and is still a part of my OG horse emblem.
Blue: Camus. Mainstay in OG horse emblem, and a very strong unit, one of the main reasons I started building horse teams.
Green: Frederick. A powerful addition to my third horse emblem team, and the reason I beat Takumi’s GHB on infernal.
Colorless: Elise. She was my first cavalry healer, and she had so much potential with a +atk boon that I built her and now use her interchangeably among my 4 completed horse emblem teams.

Magic/staff (general, non-movement specific)

Red: Leo. He is a cavalmage commonly overlooked. He is extremely strong with the right investment, and is my favorite mage overall because not many people see him as anything more than QR fodder.
Blue: Ursula. One of my two GHB units (the other being Michalis) I take great pride in. She has a very strong build, and is also commonly overlooked when compared to units like L’Arachel.
Green: Cecilia. She was my first green mage, and came in the same summoning circle that gave me my first 5* unit (Lyn). I have her as a 4*+10 unit, and she regularly kills max merged units with ease thanks to her extremely high damage potential.
Colorless: still Elise. She may be my favorite unit overall, and completes the group I just named as my first iteration of horse blade emblem, my strongest player controlled team I have made to date.

Overall, Ayra, Fjorm, Michalis, and Elise are my favorite units from each color.

Thank you for making such a positive post. I really needed some good vibes.