Does Hiro ever get an ounce of respect from anyone? He's not treated well. His death is on Hime since the mistakes of a subordinate are the responsibility of the master. He was killed, and she brought him back, but only as an undead servant whose life is forever tied to hers.
So now he's her responsibility, which I can't stress enough. But in the first volume, not only has she straight up forgotten to give him blood, which got him captured and hurt, she's also not given him blood because she was toying with him by dripping it off the balcony and making him try to catch it. Yet every time she does give him blood, she acts like she's doing him a favor and he should be grateful.
She does come and save him occasionally, but that's the absolute least she should do, he's her responsibility, and it's sometimes her fault he's in trouble in the first place.
He's supposed to be a blood warrior, but he's never able to do anything to prove himself. He's rarely even useful, and when he is, his only use is as a meat shield, dying in her place or taking a hit for her. He usually ends up dead on the ground pretty quickly and is not even involved in the fight. And now she's got an actual strong warrior serving her, so he's even less useful.
He doesn't get much respect as a person, and he doesn't the respect you owe to someone whose life you've fucked up, and he can't even get respect as someone who's useful and strong.
But I feel like that's not going to change. Does it?