Sorry, but that attitude is not nice, it’s possessive

I think it’s jealousy and somehow, he doesnt want Sheli hurt or touch Mo again (=・ω・=)

He tian lost his puppy bcs he couldnt protect it enough so i think it's a reason why he is overly possessive over momo and demand him to wear earring as mark so no one snatchs him.
Life becomes complicated once you have trauma.