Rereading this chapter is rough. Pina's blatant manipulation and lie is egregious. Seeing her face really made me wants to slap her hard.
And Emi being naive and passive is also at fault. Pina already show hostility at their first encountered. That already proved that this bitch were jealous because her "harem boys" were flocking to Remilia, not her. So, try to talk to her is pointless. It's already cleared, Pina wants that harem boys for herself.
Also, Emi's thinking because two of them as a fellow fan of this otome game, that means they can talk it over is completely wrong. The level of love between Emi and Pina were different. Emi loves the characters for who they really are. Pina loves the characters because they showered the Star Maiden with praise and affection.