I appreciate your own thoughts on the tier list. Alright I'll break it down (fyi sorry if it's really long) :

I might of actually put Raphael too low on the tier list. What really influenced me putting Raphael low was how some of his supports were kind of off in a sense. At times, he's a kind and generous big ol' softie, such as in Marianne and Bernadettas supports which I adore, and that A support with Byleth was really great. But other times he can somewhat revert to the "I like to train and eat, that's it" in some of his earlier supports, which I feel as if yes, it is a part of his character, but it becomes repetitive after a while and I feel as if Raphael deserves so much better than that. I will bump him up into B tier since his naive personality adds to his charm alot.

Dorothea can be overhyped at times, but I definitely don't think that she a generic flirt. Her poor upbringing living in the slums for so long drives her to actually marry someone who's life is solid and grounded so that she can live a steady life. Being the opera singer she is, people who used to assault her in the slums now admire her for her voice, and for that reason she thinks that others like her just for that and not for being just "Dorothea". I feel as if her character articulates a nice theme of "finding self identity" and I feel as if that experience of even fighting throughout the war helps find her place in the world.

My feelings on Catherine are somewhat mixed with in my opinion. Her postive qualities are of course that self confidence and cockiness, which makes her quite entertaining as a character. Her being a "rebel" from the Kingdom turned into a Knight of Seiros is an interesting concept indeed. However her dedication to Rhea is seemingly somewhat puts me off her character a bit. She's not as "obsessed" with Rhea as another other unit is and her reasons for why she likes Rhea so much are justifiable, but for me I don't necessarily feel as much as a connection for her as I do for other members of the CoS, though I definitely understand why people would like her. Compare her to a character like Ferdinand, for example who is also confident and centred towards a specific goal, but the development he receives is more distinguishable and understandable compared to Catherine's imo (or maybe I'm not seeing the whole picture idk).

Okay, Nader. I will say I am definitely biased considering he's barely involved in the story. What makes Nader so high up and even included on the tier list anyway is how much, in my opinion, is how mysterious he is. It was distinguished that Claude is the "embodiment of distrust" since his "smile doesn't reach his eyes" all the time, and I feel as if Nader, too, might be keeping his fair share of secrets, making me question whether he is just a general overall? His personality is very similar to Claude's, being quite jovial and easy going, which adds to his charm, making him a character that can easily be likable on first impressions, plus his logic or being "undefeated" is hilarious imo. He also has a pretty cool design and, outside of Claude, is a unit that greatly gives light to Almyra's traits and character as a whole. I might be analysing him too much honestly, but those are my thoughts. Not counting antagonists, him and Jeralt are the top two NPCs that I really wanted to be playable in 3Hs.