Marcel, on the other hand, is more of a mystery. I checked the interactions with him when I played the remaster: The first time is when Lena and Louise meet him together, and Louise thinks he's flirting with Lena, while Lena thinks he was only being friendly. He did call her "baby", though. The second time he recognises Lena as Ivy's friend, but not Louise (poor woman, always outshined by her friends). That's followed by the interaction where he shows some interest in Holly's writing, which ends in both of them introducing themselves to Marcel. That's it.
Anyone got an idea what we might see him involved in? It seems unlikely that Holly, even if she's influenced by Ivy, will get involved with a bouncer three times her size yet; she does literally hide behind Lena when they first meet him. I could see a night out at Blazer for Lena, where she's could end the night with several different partners depending on the playthrough—also including a spontaneous option to hook up with Marcel. But my guess would probably be something relating to Ivy: "What are you saying, Holly, you haven't gotten a single dick pic from Mark/Ian yet? You should just ask them, guys love sending pictures of their dicks. Let me send a text to that bouncer guy at the club, I guarantee you he'll send me his dick within a minute."