I think Diluc's love language would be acts of service! I would have a variety of ways to show love to be honest, but mostly spending time with him and touch. I'd love to cuddle him, kiss him, and simply hold his hand every single day! I like giving him a lot of gentle touches :3 And I think he'd like to do things for me, such as organizing my things, washing my dishes, protecting me (though I want to protect him too! I'm his Knight :<), and other things. He's so silly :3