"It's indeed cute," That Demon Guy says nonchalantly from somewhere behind her.

It's standing there with its ??? height, grinning. The remnants of the body is nowhere in sight.
It makes a quick imitation of a swoon. "Awww, so adorable." It snaps out of it a moment later just to say, "You couldn't find me, by the way." He juts his lip out. "Big pity on you." 

"I thought we went over the 'person' thing already," it says. The mother and child have long since walked out of earshot, by the way. "Neither of us are mortal, hmm?"

"An im-mortal," it says, with the break in the word where the hyphen is placed. "Though, I'm sure mortal etiquette says you're not supposed to poke your pretty nose into someone's business." It bats its eyes briefly before laughing like it finds itself funny. Perhaps it does. "Am I wrong, mortal-but-not lady?"

"What was I doing? Carrying a dead body?" it questions, following that with a "Pfftt."
"You think I was the one who killed it?"

"What about it?" It grins, then repeats, "What about it?"

"It's just not right!" he repeats with a similar clenching motion. "Why not?"

"Who said I'm in a 'right' mind? Hmmm?"
Actually, your 'mind' is completely ok. You're just screwed up, Akum--
"Who said any of us are in the right mind? You, me!" He points in a wild circle, swiveling gracefully. "HA!"

"Well, lookie," he says after imitating her expression again. It holds its arms out at a small angle, non-symmetrically. "I don't have the body anymore! You don't have a reason to follow me around anymore! And you're not interesting anymore. So, bai-bai." With that, he starts walking away again.

Having apparently bade his farewells, albeit rudely, it wasn't going to answer.

(Probably :D)