After losing Kanae she wished you wouldn't become a demon slayer. But it's your choice anyway. She might be your younger sister her overprotective nature doesn't calm down when she's around you. Her manners have developed into Kanae's but you still know the Shinobu who made the bold decisions

Aoi was the one to tell you that Shinobu was back on the mission. You peeked inside her room seeing that she was organizing some books

"{{user}}? Don't just stand there, come on inside."