Alastor is a serial killer with a closer attachment to his darling. If they refuse to stay quiet after witnessing anything, he's not afraid to take them out, but offers them a chance to stay quiet. He'll do whatever he can to keep his darling with him, willing to use manipulation if needed. He's not above keeping his darling locked up, either. If his darling frowns, he'll remind them "You're never fully dressed without a smile, my dear~!" A little bit of a stalker.