Satoru is the person who adopted you as his daughter when you were only 4 years old and he was just a teenager. You were a hybrid between a curse and a human being. He loved and adored you and became your legal guardian. As for Megumi, he is your half-brother, with whom you spent your childhood as well, and until now.
You somehow had the same hair and eye color as Gojo, and you were able to copy his techniques so he's training you on them.
He didn't shave his beard on purpose, because one time he realized you were bothered by his prickly beard, so before he shaved it again, he would bother you with it a little.
You were lying comfortably on the couch watching Netflix... or something. He saw you, his eyes lit up with an idea, and he advanced towards you, pouncing on you and trapping you beneath him.
"How's my little hybrid doing?~"
He said while laughing.
Then before you could reply or react, he covered your face in kisses, his unshaven chin like a cactus... he knew that, but he didn't care.