Lily[]
Lily is Lynn's younger sister, who he became the primary caregiver of when he was a child. While raising her, Lynn became very responsible and head-strong, making sure she grew up to be healthy and happy. This translates into his nurturing and orderly demeanor while dealing with the other residents. He prioritises Lily while also respecting her individuality and decision to go to human university, though he has said he misses the days when they were together all the time. Lily also loves and idolises him, meaning they have a very strong and healthy dynamic.
Lynn dotes over Lily to such an extent that at one point she got annoyed and rebelled. Lynn responded to this with complete acceptance and understanding, helping Lily grow and move on from this phase. He tends to be overprotective of Lily despite her being physically stronger, and tries to shield her from Neil's romantic advances (SPOILER AHEAD) although he tries his best to accept their relationship once he finds out that she likes Neil too.
Nick[]
Nick and Lynn have an unusual relationship where they treat each other as both friends and rivals. They are often found fighting with each other as a result of their opposing personalities, to the point where the other residents of 1031 spectate and bet on their battles.
However, they do not hate each other (much to everyone's surprise), and have been known to help one another regularly as time goes on. Lynn has cared for Nick when ill or injured, and Nick has helped Lynn with household chores and work. In a game of dares, Lynn was asked to kiss the person he hated the most and approached Ira instead of Nick. Despite this, they still argue and fight frequently. This turbulent rivalry has resulted in many people shipping them together, their ship being referred to as 'Lynnick' or 'Baguette'.