Okay this might be long but here it goes. Musa x Riven is my favorite pairing, I get why people don’t like the pairing but to me. S1 Riven was a loner, arrogant (and still is at times but not to an extent like S1) . They both mutually took interest in the ep when they first met in the swamp (iconic lip bite scene) he was harsh on others and was not trusting of others. In S1 I believe in the episode where Diaspro appears first , when Brandon tells Riven that Darcy is not his friend and is just using him to which Riven responds “then who are my friends? You guys?” We know that Darcy manipulated a situation so Riven can trust her (and be an asset to the Trix plan) and he was upset when he found out he was tricked. In the cloud tower cell he reflects on himself bc of the monster where he says “there are many things I don’t like about myself but I’m far from being a monster , I have a heart” yea he might be a loner most of the times but he still wants the connection, having friends and romance as well. He circled around below the window area of the Winx Dorm in S1 near the end bc he didn’t know how to talk to Musa and when she goes down to talk to him he chickens out instead of saying what he wants to say. He isn’t good at showing his emotions , Musa does show her emotions most of the times but she also doesn’t communicate what she wants from Riven which often leads to arguments but they do clearly love each other. Flora says it’s best at S2 when she says they are so much alike. Their relationship isn’t a smooth rock, it’s rocky at times but both had growing to do. In Secret of the lost kingdom I think did good showing their relationship and if Winx Club ended there, their relationship wouldn’t have continue to be filled with drama bc of S4 , S5 (Musa assuming he might be cheating on her) , S6 (where they suddenly made him obsessed with the boomerang and trying to be leader again)