I dunno why I read Jeralt when you wrote Jeritza lol.
Anywho for my likes that you mentioned,
Rhea: Rhea's up on my list as I like her as a character and the role she plays. She and Edelgard are next to each other due to me liking nearly equally with Rhea taking a higher spot seeing as I side with her over Edelgard. Rhea and Edelgard are two complex characters who have opened countless in depth conversations on who is more moral, who is more sympathetic, what is X character's true nature, etc. This is something that would not have happened if these two were boring and shallow characters who were objectively on one side of the spectrum. While I consider Rhea closer to being morally white than Edelgard, it really isn't a big gap and both are still firmly gray imho. And I still heavily disagree with many actions Rhea has made and yet I still sympathize with her motives and actions moreso than Edelgard's who I still sympathize with. I will still defend her no matter what however. Edelgard and Rhea basically showed me that this story isn't simply black and white and whose side you are on depends on your own morals and ideals.
Also, this really put Rhea's nature in perspective for me which made me like her even more.
Ignatz: He's an adorkable art nerd.....kinda like me (although I can't paint to save my life). I just really gravitated towards him as a character, it doesn't take much to stick with me tbh.
Caspar: He was a favorite of mine's from the start. I instantly gravitate towards the energetic and upbeat characters (usually) and Caspar didn't disappoint. Despite how simple he appears on the surface, he has a lot of depth with determining how to really enforce his personal view on justice and learning that simply killing villains will not solve the issue. He's also a dork and he cracks me up. His supports with Bernie and Ashe are also very wholesome.
Dorothea: .......Meteor.....I guess you want more than that huh? Well, to be blunt, her supports with Ferdinand von Aegir (gotta say the whole name) is what put her where she was. She was someone who interested me overall and I wasn't disappointed.
Ashe: Wholesome as ****. He's a dork (I like dorky characters). His personal struggles are heartwrenching and he just makes me smile. Nothing more to say honestly.
Manuela: This is an example of "Dragon is easy to please". Honestly...she just made me laugh. Not much else. I never even used her in battle once lol.