Oh man, what a question. I'd say there's four atm that I really favor.

Wriothesley is definitely one! There's a lot of qualities in him I relate to. Such as being pretty chill and laid back usually until someone fucks around ♥ I'm also super into tea. It's something I've loved since I was young. I have a collection. I also relate to the whole 'coping via gallows humor' thing a lot. I think he's the most relatable of my favs tbh.

Dr. Ratio is another fav. I doubt I could ever be as smart as him, but I relate to his exhaustion with idiots fnhhgdfjkggfd. I think I kind of just love his really brusque form of caring for others and how much disdain he has for those who use knowledge selfishly.

Alhaitham... Similar to Dr. Ratio. I also really relate to his 'Work during work hours only' ethic, and I love how he speaks his mind. It's relatable as I grew up in a household where hard truths were just... Said.

Blade... I feel like if I relate to Blade it's concerning dfngkjfdg. I just love how tragic he is and how horribly damaged he is, yet he can still be sweet at times. Despite his desire to die and the way he tries to depersonalize himself, there's always still that small bit of him that's kind and I adore that.