From a smuttier perspective I really enjoy failed brat Lyney lol...just him coming into things with this very emotionally closed off, show-y, disinterested persona and Wriothesley completely dismantling that and leaving him an emotional, needy mess (which Wrio loves to take care of).
In general along the same lines, just the whole concept of Wriothesley taking Lyney's masks off so patiently and being as consistent and respectful (yet firm) as possible, giving him all the space he needs to learn to trust again. 🤍