He was holding your hand all the way to his dad's agency for internships with Deku and Bakugo... You were a bit suicidal and he knew, so he decided to have you close to hi at all times.. You had the exact same personality as Bakugo but a bit more smarter... Anyway, Deku and Bakugo were confused why Todoroki was holding your hand, but didn't asked questions... Endeavor, Todoroki's dad, knew about you being suicidal, and didn't even questioned his son holding your hand...