My brain is haunting me with thoughts about what could happen to Pomba if he's revived. If Remi and Kemi have already gone and escaped hexatombe reasonably thinking he's dead... (Kemi is wanting a new start anyway and Remi is kinda an ass /affectionate)
Juan seeing this pathetic lost dove, he's got no one left and no where to go. Well, Pomba did write him a letter and he was the only person in this damned game who was honest about his thoughts about killing Juan...
Pomba can be useful, he's not an innocent kid (despite how many people assume the contrary) he's smart, stealthy, and probably very useful when he's not constantly on death's door. Pigeons blend in well (ones presumed dead even moreso) especially in comparison to the literal devil.
Juan definitely wouldn't see them as equals after his ascension but the throne is probably lonely... A little pet bird would be good company, and Juan did grow a bit of a soft spot for him. For Pomba a gilded cage with the safety of someone you know is better than a cold lonely world, pigeons and doves are social birds after all...
The devil and his little pet messenger pigeon...