LEMME THINK HMM

• The Loporrits and Argos are essentially his children. (he was Venat's lover)
• Might have had FWB-esque relationships with the Twelve and/or Primals, he's an old storied being just like them, these might be rumours in a history book.
• He has a strange relationship with @katsauzone's Meteor where they're both too big for the star they're on and get into crazy bloody world-shattering fights, while also having to act like normal human beings around their partners Kata (a WoL) and Lyse who are friends...
• His merging with Ardbert after Dying Gasp changed his physique and made him buffer LOL
  
• Hmm.. he was 100% convinced and resigned to the thought he was gonna outlive everyone he knew for most of MSQ (Light's blessing gives him regen/unnatural strength) until the Mothercrystal fight.. he finally has a chance to grow old and pass away now :)

not sure if these are unhinged enough??

Yeah... mostly over parts of their personalities that clash!! He's stubborn, a closed book while she's highly strung at times and sensitive to his bad moods. It gets worse when they have to be away from eachother for long periods. Catman is an extremely stubborn outsider, and it took a good while for him and Lyse to reach a comfortable place of sharing their thoughts etc. After EW he lived basically off-grid for a few years on the Island Sanctuary and didn't even tell her RIP.... Lyse will try to shoulder a lot his burdens alongside her own and feel enough guilt for them both. She'd apologise to him faster for something she didn't even do.