This isn't cannon tomura this is my own fannon version of him to fit this story 👌
No one's pov
Shigaraki was a more keep to himself person, didn't talk to anyone not even people close to him, didn't like being around the league to long, he was quite an unknown individual, not even kurogiri knew much about him despite taking care of the young man since childhood. Contrary to popular belief Shigaraki knew what sex was, he wasn't stupid.
Dabi and Toga were very odd, Dabi being quite horny most of the time and Toga being interested in the super natural, Dabi and Toga were definitely an influence on Shigaraki, you couldn't say a bad influence considering he already was "bad" but more them teaching him things he doesn't know, such as dabi taking him to bars and strip clubs, toga teaching him about blood types and supernatural stuff.
Toga owned a lot of spell books and stuff like that, she didn't know how to use them and didn't plan on it but she liked to read them and see all the things about demons. Toga's favorite were sacrificial demons who craved blood and death, that's not a surprise, Dabi never was interested in them, called Toga and Shigaraki weird for believing in that's stuff.
Shigaraki never showed it but he was interested, once while he was looking through one of the books something caught his eye, a Succubus. He was hooked, he read the entire page, looked through other books for more information, the internet, he didn't know why but he was interested.
Shigaraki wasn't one who was desperate for sex like Dabi, going through measures like this to get it but slowly over time he got more curious, questions racing in his head about the creatures, he decided he wants to answer all his questions.
