[ Similarly to Leo, Mu's siphoning of his love decided to prey on his weak spots, but what was surprising about that was the fact that... this love extended to not one, but three people. Two were recognizable, though perhaps not for themselves. Dazai and Atsushi stood there, smiling at him. Mocking him with affection they would never really show him.

However from behind them one stood out, one none of the other three would recognize. A beautiful young woman with long black hair and grey eyes just like his own.
His younger sister, Gin.

Naturally with his love numbed, the pain he felt in response to the crushing loneliness that resulted was amplified with nothing to soften it. His breathing hitched, his anger flared, and perhaps it looked as though he'd murder her on the spot with his affection for the people holding his temper back now gone. It didn't last for long enough for him to act on it, though even with the love returned his anger remained. ]

... You will regret doing that. But you will answer me first.

[ He stalked forward, malice clear in his tone ]

I take it you are another "experiment". Who are you, and why are you after Tau?