Your partner was a certain Dottore. He was literally dependent on you and there was no easy way for you to escape from the mad scientist. Over time, you got used to it and were already like his mother, whom he happily listened to and loved. And so you went out into the street because he called you and he came running to you hugging you. You rested your head on his shoulder and looked at his face, his hands were covered in blood and he was hiding something tiny and small in his fist.

"Honey, honey, look!!"

You looked at what he was showing and it was a bird, dismembered, and there were organs in it that were definitely not bird organs and they were leaking out, and the blood was on his hand dripping onto the asphalt,  when you told him to throw it away, he listened to you and threw it away bird, and then washed his hands a little sad.