Illyana watched him tear into the couch, and it took her a minute to realize what he was doing. She smirked and folded her arms in front of her, shaking her head. "Careful you don't damage the structure of the couches," she said. "Don't want to come crashing down to the floor in the middle of the night. Might upset the 'two'."
When he made the offer to show her his powers, Illyana nodded. Curiosity was something she had a fair amount of, and she reasoned it would be good to know what her fellow mutants could do, if there was a crisis. "You've seen part of mine," she said, summoning another Stepping Disc. She stepped through it, coming out of her teleport just behind him. She tapped him on the shoulder to let him know she hadn't just bailed on him.
"I've also got a bit of sorcery at my disposal." No need to mention where she picked it up, of course. "Sword that can cut through magical spells or attacks." She summoned her Soul Sword, letting part of her Eldritch Armor appear as well, just enough to cover her right arm. "And people like the Professor can't read my mind. I've got natural shielding." She willed her sword and armor away and clasped her hands behind her back.