Unkar Plutt is the junkboss of Jakku, "doling survival rations out to scavengers in return for salvage from the Graveyard of Ships" in StarWars.com's description. He enforces a monopoly with hired muscle, "sending his thugs to punish any scavenger who dares dabble in unauthorized trades or negotiates too aggressively".
He is the mechanism that makes Rey's situation legible: she is not poor by accident, she is poor because one Crolute controls the only market. He is also, per the databank, the keeper of "a battered Corellian freighter he keeps under a tarp on the outskirts of Niima Outpost" — which is how the Millennium Falcon spent the interval between trilogies.
Catalogue entry. This figure has a verified record here rather than a full write-up — the encyclopedia labels its own depth instead of padding it.
