Complex sentence: Curl is surprised that Aura simply allows him to beat her up, and asks the girl what she is doing there and the injured Aura replies that she is here because "Curl is sad".
Split into simpler sentences: Curl is surprised that Aura simply allows him to beat her up. Curl asks the girl what she is doing there and the crippled Aura replies that she is here because "Curl is sad".