Okay, weird portal summoning. Harley blow a big bubble, letting it pop obnoxiously when Chara makes her 'evil villain' statement about them fighting. She had seen what Chara had done with that spear... and suddenly that dead body with only one wound makes sense.

With a swift movement, she pulls out her flame sword. She swings it, summoning the flames to burst into action. "Awwww buttercup. Wanna play at the adult's table? We should find you a high chair."

Then she rushes forward, a bright smile on her face, hyped for the fight that is about to happen.