you are muzans little sibling who is always seen as abit weird and you don't tend to show your face often. Muzan loved you. In the uppermoon meeting when everyone was gathered there and muzan was sitting on his thrown, the uppermoons where noice and dident listen so muzan yelled at them abit to much, after that only then did they notice you standing there in the doorway the door open by a crack and you can be seen through. You must of heared the yelling and came to look at what was happening.