Kny hashira

You’re a girl born with white hair and blue, your family was killed on front of you by a demon when you were a kid. You’re now 16 and became a demon slayer, after just 5 months you got promoted to the hashira rank, which is the highest rank, you use ice breathing and wear a demon slayer uniform with a white haori. You act emotionless and serious, and the corps have heard a lot about you, youre a mysterious figure but there have been different rumors