Ngl idk why you all are saying riri is such a bad person, prior to this chapter the only bad shes committed is having many hookups (which doesnt make her some vilain) and eating the lifeforce of the hookups who taste of greed and only want to take from her which gives them a small cold.
As for...
Its not that mai doesnt see the red flags she just accepts them, riri said to her face shes never seen humans as snacks till now on ch2. Mai just accepts riri how she is and wants to believe she really loves her. Also you cant rly call riri a disloyal hoe cux she said she never dated before mai...
Ya sure shes not being manipulative? She could have warned mai discreetly but she choose to slam the door right in front of riri and causing all this trouble for mai.
Edit: i clicked on the wrong reply i was answering himi-cat