Sue Yi + Anndi Allen

Sue Yi and Anndi Allen are rivals. Sue's negative view of Anndi stems from her blaming her for ruining her paint from kindergarten, much like how Anndi harbors a similar resentment towards Sue. In season 2, Sue is shown to be very jealous of Dweaji's new-found affection for Anndi when she wears a bikini and goes to great lengths of trying to challenge her and dissuade her from pursuing a relationship with Dweaji. This, combined with the fact that she sees Anndi partially responsible for Dweaji's demise, explains why she seems to be uncomfortable, condescending and resentful towards her in episodes set in the current time.

It is shown that Anndi was not fond of Sue in the past, evident by her unkind behavior towards her.