Very lucky indeed. He’s glad she’s tolerating of that or else he’d either be a) beat up or b) not as close as they are. And that would be a shame indeed. Very sad. “Of course, love. I’ll take you with all you imperfections because that’s what makes you perfect to me~” he murmured, stroking her head gently. He chuckled inaudibly, looking at her fondly. “Would you like me to call you by your given name then, Mukuro~?”
[♙]: He should already know by now that both of those possibilities will never occur if it’s him that’s doing the teasing, she just hopes that he won’t use that little loop hole to his advantage too much.
"…t-that means a lot to me…really, it does…and of course I’ll also accept you with your imperfections…not like I’ve noticed any, since you’re already perfect…~" She thought she should at least try and embarrass him a little with flattery, not that it’d really work anyway. "…and I’d like that very much, thank you…and I hope you don’t mind if I just call you Ren from now on, hm…?"
Yes he's aware of his special place and position of being one of the few to tease her. He won't use it to his advantage too much, he does know moderation, but he's definitely going to use it.
He laughed a bit at her flattering words. "Everyone has their imperfections, dear, even me." He's definitely far from perfect, especially in his own mind. He could list of a number of things people have told him off for. Though... it's not like he listens to them at all. "Alright then, Mukuro," he smiled before adding teasingly, "And you've always called my by my first name~ It's always been okay."