He thinks if they’d been standing Sirius might’ve stepped back at that; it seems to throw him something fierce at least. Thanks to the power of Legilimency Harry has vivid memories of Walburga Black as a prim 16 year old, quietly appraising an angry 13 year old Tom Riddle right after an attack forced Mars to finally call upon the serpents guarding Slytherin House. After the Parselmouth reveal she’d taken it upon herself to teach him proper etiquette and how to survive the political fuckery that older Slytherins engaged in.