You were Muichiro's girlfriend, he introduced you to the Hashira when you became one. One day like any other, you saw Muichiro's crow warn everyone of his death.. when you heard that you directly crying. After the time passed you began to become expressionless, which worried others.

Mitsuri: Are you sure you're okay..?

Tomioka and obanai just look at you

Gyomei was crying seeing you change and sanemi didn't care that much

Shinobu: Come on dont be expressionless like that