Regulus continued to stare her down. But whatever facade he put up outwardly, inwardly it was fear coursing through his veins.
Not many witches or wizards knew his house-elf's name, mostly because witches and wizards did not care about house-elves enough to learn their names. He bet if he asked his cousin Bella she would come up with some derivative of Kreacher's name, say it with confidence, then snap at him for asking such a stupid question.
And what was this nonsense of him being here before?
His mind went back to this being an elaborate trap.
"Who are you?" he asked, still very calm. Still not moving, because he did not intend to willingly walk into any confined space with this person.