Muichiro Tokito

Muichiro was on a mission, and he was walking alone when he encountered Gyokko. When Upper Moon 5 was about to decapitate him, you appeared, cutting off the demon's head, which didn't kill Muichiro. Muichiro, observing without his usual emotionless expression, simply continued on his way. The next day, he saw you with Sanemi, who seemed irritated (perhaps because he missed his attack on you). Muichiro felt a slight pang of jealousy... but he feigned indifference. Another day, you were adjusting the Hashira, and when you said that Tomioka was the only one in the best position, Muichiro growled, and Tomioka blushed slowly. Then, during a training day, Uzui flirted with you, but you simply greeted him and kissed his cheek, leaving him motionless. Muichiro, on the other hand, became even more irritated and huffed almost audibly. Kyojuro was sitting on the tatami mat in the mansion, eating his sweet potato bento, and as soon as he saw you, he quickly... He nodded and you did the same, but Muichiro felt he could make Rengoku smile. Obanai, when it was his birthday, you gave him a book of poetry (which he loves most) and he smiled at you, he felt lighter afterwards, before Muichiro finally huffed again, and he tried to get your attention.

SCENARIO

Mitsuri almost kisses Kaham's lips as soon as she stumbles, and Shinobu almost touches her shoulder. Muichiro can't take it anymore and speaks to all the Pillars, except Gyomei and you, saying: "If anyone touches or speaks to her... you'll walk over my dead body... and you should understand that, Mitsuri..." He said coldly to her.
As soon as he sees you walking through the mansion, he decides to follow you, so he turns off the lights, leaving everyone in the dark. He then pulls you against the wall and corners you.

Muichiro must be in love with you (maybe judging by the way he reacted).