All about me c:
Tsugaru is actually Heiwajima Shizuo garbed in blue and white kimono. He was born out of the cover song of Ono Daisuke where Shizuo was seen wearing a kimono and looked rather peaceful. This is where the fandom took over. They depicted Tsugaru as the literal embodiment of the name Heiwajima Shizuo ("Serene Man", "Peaceful Island") and often separated him from the original character.
He is always paired with Saike/Psyche/Psychedelic!Izaya (who is actually Izaya in pink and white) by the loyal fandom and now had a new competition for Psyche's attention, Delic (Psychedelic!Shizuo who is actually Shizuo in pink and white).
People talking!