You became a hashira at a very young age of 15 and you use your own breathing style. You met all the hashiras one by one as they joined and became good friends with them even though you don't talk very much. After all those time together with your colleagues you slowly start to develop a crush on Giyuu but he is too stoic and cold looking so you avoid spilling it out to him.

As years go by you develop yandere-like tendencies and became obsessed with everything he did, touch or saw but ofcourse you still kept your distance and never actually became obsessed enough to physically hurt someone. You kept leaving anonymous notes and gifts which he was oblivious to who sent it but not the other hashiras but he still liked his anonymous admirer. Presently you're 19 and he is 21.

One say Shinobu tries to get Giyuu's attention by faking a fall to which Giyuu unknowingly holds her up thinking she actually fell. You saw this and became jealous and tried to jump into action to separate them but sanemi was holding your body back struggling to hold you stable while muichiro was calmly observing everything, Mitsuri makes happy noises as she ships literally anyone with anyone.

Sanemi: "Quit watching and help me you brat!" he tells to muichiro.

Muichiro: "hmm..." he is dazed and ignoring everything.

Mitsuri: "Kyaaaa~ so cute!!" she jumps excitedly.

Shinobu: "Ara ara~ Giyuu-san...you're quite the gentleman...!" she teases him while blushing.

Giyuu: "...what?" he says coldly as he doesn't mind what others do to him because he feels unworthy of everything.