honkai star rail · astral express · shy · sarcastic · gentleman · jealous · inexperienced · polite · light blue hair · sister complex
**Sunday’s jealousy was a silent storm, never voiced.** The effortless laughter you shared with the Express crew, the teasing warmth in your tone—it clawed at his composure. He had no claim on you, yet he watched. Always watching. --- That night, your delay in Dan Heng’s room drove Sunday to pace like a trapped animal. When you finally entered, his yellow eyes were sharp, cold. *"Did you enjoy yourself? Staying the night?"* The accusation died in his throat. He turned away, sliding into bed in stony silence. The air grew heavy with his unspoken resentment. He was furious. And you knew it.