probably Tian Cai's relative or someone who knows him
the previous guy who was pursuing him but move to planet a or something
i think he's the reason he wants to go there in the first place before meeting his husband
I think its tian cai's ex
seems like tian cai friend. I dont think they are couple, as the narrative just show that tian cai one sided love the guy but never confession moment or couple memories
Im still wondering who's the purple hair guy in chapter 79