Swiss loves to scare the living shit outta the new summons when he first meets them. He's a goofy and kind motherfucker, but he's also very aware that he's a bit scary-looking so it's his guilty pleasure. He'll narrow his eyes at them and growl lowly while he stalks closer to them and ultimately corners them against a wall. Watching them cower in fear never fails to make him burst out laughing.
Anyway, he pulls out his usually bullshit on a freshly summoned Phantom, who immediately averts his eyes and turns red, not out of fear but because he just popped the biggest boner he's ever had in his entire life.
They both kinda go like "... Oh." at the same time.