I headcanon Tanaka as natural blond (maybe an ashy tone like Suga, but based on Saeko it can be Tsukki blond too). Ennoshita would think that it makes Tanaka easy to spot even in big crowds. So when Tanaka shaves his head, and Ennoshita can still pinpoint him in a crowd, he comes to the realization that it's not Tanaka's hair colour that made him easy to spot, but it's his slowly developing crush that guides him to Tanaka every time.
Share your first year headcanons!











