Board Thread:General Discussion/@comment-6192846-20130929130231/@comment-6192846-20140501013408

Well Chapter 2 is Mikulia so we might get that mentioned. In part, I want to say it's because "the Demon could probably sense another Demon using her" but then there's Kachess...

Since Venomania can allegedly sense magical power, like with the Marlon Spoon when he mistook it for a vessel of sin (actually, we should mention that in his Skills), I wouldn't be surprised if he noticed Mikulia had an unnatural, wicked aura around her with the DoS.