Theodorus is actually kind of cute... he's actually very sensitive but acts cold. He cares a lot about Umehiko it seems.
He's the classic cold personality but has cute points. Like he's easily jealous like a child, will do what he is requested (with a cost) and seems to secretly be caring of others. I love himmmm. Umehiko is meh
Dear Sister, I've Become a Blessed Maiden