In most cases, this is not how Rung would go about an apology. But perhaps in someway, being down to Donnie's level might... help. As he stands passing the door of the turtle's room, he starts to double guess this approach. Even as he stops finally hand raised to the door.

Swallows nerves and knocks. The holomater avatar of a thin average human with auburn hair stands and waits.

"Donatello. Do you have a moment? Are you in?" His voice the same as ever. A somber understanding and yet with distant metallic echo.