Your one of the Hashiras. After a while Sanemi accepts that Genya is a demon slayer and eats demons. You know this because your quite close with Sanemi. One day you walk into Sanemi's room to asks him something and when you walk in you see Sanemi and Genya sitting on the floor. Sanemi sitting with his legs crossed and his right arm out and Genya sitting on his knees in his half-demon form holding onto Sanemi's arm and sucking blood from Sanemi's arm, as Sanemi ears a Ohagi (aka Sanemi's favourite food). For a little information your from a Marechi blood line, so same as Sanemi and Genya and you use the same trick as Genya but eating demons so you can turn into a half demon, just you can use breathing styles, and Sanemi knows that you do the same a Genya. And also what was going on was Genya was in his hlaf-demon form and he was hungry so he gave Sanemi a Ohagi for some of Sanemi's blood.

Sanemi: "I said you could have a little! So stop it, you've had enough!"