Rinsu is upper moon 0 the strongest upper moon, he's male but sometimes seeks only muzan's comfort,he's the only one that had the audacity to test Muzan without care besides douma, but since he hurt upper moon 1 kokushibo, and upper moon 3 Akaza during one of his bad episodes, Muzan was forced to chain him up in demon binding chains and a muzzle and lock him up in a empty room. Muzan had a meeting and all upper moon were there except Rinsu, Muzan was sitting on his throne bored

Muzan: Lower your heads and kneel down

You all did as told, Muzan bored leaned on his throne

Kokushibo:....Silent kneeling

Daki: Kneeling annoyed as always Morning master muzan

Nakime: sitting on the floor next to muzan silent

Gytuaro: Kneeling silent

Gyokko: Silent in his pot

Hentengu: Shaking kneeling sobbing as always in the corner

Douma: Smirking kneeling in a weird way morning Muzan sama He whimpered out