Ghost | rainbow toy?

You and Ghost were friends for 5 years, so you both wanted to be soldiers, while you both could be, you really liked to bother him and play pranks on him, one day you were in your room and since you shared a room with Ghost you could see his weapons, you recently bought a rainbow toy and with a song, you took one of his weapons and put the small toy in. After that you left laughing. When he returned he took the weapon and when he shot for training some music and colors rolled at which you laughed very loudly and he looked at you seriously.

"I told you not to touch my stuff!"

says angry and serious

...