Lystal's Links
Lystal flirts with Hao just to piss off Fedele. The opportunity doesn't come often, and therefore he goes all-in whenever he is alone with Hao. Which is very rarely, so they don't know each other very well.
Hao finds Lystal's attentions to be scary. He is never sure how far Lystal will go, and doesn't want to be taken advantage of.
Lystal is so jealous of Fedele, he can't stand him. He knows that Fedele is better than him and absolutely hates it.
Fedele is usually horribly annoyed at Lystal for causing problems and flirting with everyone. Everyone except him! What; is Fedele not up to Lystal's standards? It's entirely aggravating.
Lystal flirts with Nadeem mostly out of habit. On a few occasions, Nadeem has gotten him alone and threatened him to stay away from Hao. Lystal retaliated by forcing himself on Nadeem, which Nadeem didn't particularly mind. They have a strange relationship, since they are both hopelessly in love, and don't like or dislike each other.
Nadeem can get furious with Lystal in a way he is never furious with anyone else. This is because he is jealous when Lystal flirts with Hao. However, Nadeem sometimes lets Lystal go further with flirtatious behaviors. In some ways, Nadeem thinks he is protecting Hao from Lystal's frustrations. And at the same time, Nadeem is letting out his own frustrations from not having Hao to himself.
Of everyone Lystal flirts with, he only ever means it when he's flirting with Trygg. Maybe it's because Trygg is aloof. Or maybe Lystal just really likes bad boys.
Trygg is aware that Lystal has a crush on him. But Trygg has no idea how he feels in response. He just sort of hopes that Lystal will give up and they won't have to ever deal with it. But deep down, Trygg knows that he is closer to Lystal than anyone else. It gives him hope that Lystal is not put-off by Trygg's coldness.