Direct answer: In Hazbin Hotel lore as of recent discussions and the available spin-off material, the ownership of Alastor’s soul is claimed by Rosie. Context and nuances:
- The backstory shown in Season 2 evidence indicates that Alastor made a deal with Rosie in his human-era, seeking power beyond imagination. According to this narrative thread, Rosie claims his soul when Alastor dies, effectively making her the owner of his soul. This is often depicted in the material as Rosie puppeting or guiding him as part of a long-term obligation Rosie's owed favor remains outstanding.
- The creators and interviews around Season 2 and Season 3 hints reinforce that Rosie's power and the exact nature of the deal are intentionally revealed gradually, with Season 3 expected to address more of Rosie’s true capabilities and the longer arc surrounding Alastor’s hiatus. While not every detail is fully explained yet, the prevailing interpretation within official material and creator commentary is that Rosie owns Alastor’s soul due to their pre-death pact.
- Some fan theories and community discussions have proposed Lilith as a potential owner or focal point, but these are speculative and not supported by the strongest canonical material currently released. The strongest, most supported reading remains Rosie as the owner from the pre-death deal.
If you’d like, I can pull the latest official statements or episode-specific details to confirm current stance for Season 3 teases or new releases.
