Dark Shadow absolutely LOVES Shoji's head pets

There are scenes of both Ochako and Hagukere petting Dark Shadow: meaning he likes head pets.

Tokoyami and Shoji are friends, and cause of that they hang out together.

Shoji's quirk makes it so that he has 6 arms, all very well equipped for head pets.

Shoji is also one of Dark Shadows favorite people in Class 1-A for the sole purpose of head pets