*Barty has never looked particularly lively himself, his ability to recognize peakiness diminished by years of failing to see it in himself. He's never legitimately seen how corpse-like Regulus can look, despite whatever skeleton based teasing he's lorded over him in the past. However, he has developed a high sensitivity to Reg's particular pattern of behavior - even the slightest deviation can reveal nearly everything to Barty's ever questing attentiveness. Suffice to say, Reg's recent misery hasn't gone under the radar.

Barty nods.*

He's living a cliche and he knows it. Dark Secrets and such. No wonder he's depressed.