Yukari's bored until he stumbles upon the awkward tension that surrounds Saruhiko Fushimi and Misaki Yata. HOMRA's vanguard is too easily riled, but... Scepter 4's third in command doesn't really blink in face of Yukari's riling, that is until Yukari zeros in on what does make Fushimi tick; Misaki. (Honestly most of the K project crew.)

He gets the call soon after the Mole incident with Fushimi. "Olympus is under attack. We need you here – can you come? Ares needs his Vanguard." The Red Clan is said to have bonds thicker than blood, but these particular bonds are strengthened with golden ichor, so he says dutifully, "Of course I'll come, Clarisse."