I'm not 100% sure what this term means but I suppose it's a character you can relate too and find comfort for yourself in. Going off from that...
While my number 1 character overall is Tenna, I wouldn't say that he is "relatable" for me per se, fortunately.
I'd think it's gotta be 
Noelle for me. First of all her design is simply adorable, like you can't say that whenever you see her light world sprite's little smile you don't at least want to smile back. Her dark world style is pretty as well. Second of all, seeing her being such a little shy goofy goober who always worries about everything going wrong just melts my heart. How she panics after saying something to Susie thinking it sounds stupid. How she wrote those old blogposts with her little XD's childishly. How she is a quiet nice girl who tries to get good grades, kinda like me. Also her pre-ch. 5 teenage crush obsession with Susie is also cute.
But most importantly, after ch. 5's weird route she has become way more relatable for me than she should've. Thankfully I haven't lost anyone from my family but the whole "watching someone else move me through my life" is strangely... similar? I don't really know how to describe that. I have also felt like the past few years have been on repeat for me too. The same old boring routine, never interrupted by anything. But unlike her I still don't have the courage to do "something crazy". I don't really know if that's a good thing or not. So that's why the WR lake scene hit me harder than it should've. Way harder. Never thought that we would see our timid quiet doe from such a different perspective. How she's tired of all of this circus. How she will never understand the other townsfolk for simply existing and never questioning anything. How she liked that Kris "changed". How despite literally putting her classmate into a coma she felt more psychologically free than her entire life. (Also how does that one sprite manage to look so scary and creepy if it's just a bit edited from her happy face or something like that)
Kris might love Susie, but I wish Noelle the very best. Hope everything turns out for her great in the normal route. Cause we all left any hope for the other one... In the span of one chapter she went from just a cute side character to easily my top 3. I love (platonically? That's what people say nowadays?) this little girl.
So anyway I went a bit offtopic but I just felt like sharing it with you guys. Who is your "comfort character"? Feel free to share why, what you find relatable in them. I would gladly listen.
P.S. Wanted to clarify that they can be from Undertale as well, not only Deltarune, I just needed to select a category for this post so I chose DR.
