I don't mind rooting for a Yandere if this kinda Yandere is like Ursh, which is a quiet noncommittal with strangers & ninja-like abilities that's even better than our MC, as I'm truly allergic to vicious & abusive Yanderes. I'm beginning to suspect though that his bloodline is the real deal, the Dragon he mentioned. That's why he will protecc & love the MC with all his might, even if he marks her as his possession. It also makes me think he's also reincarnated. These two independent side characters are a power couple we seldom meet in an Isekai setting.