Raul Bautista
A bank robber, and one of the faces Rockstar put on the cover art alongside Jason and Lucia.
Raul Bautista is described by Rockstar as a bank robber, which places him close to the vault sequence shown in the official screenshot set.
He is prominent enough in the marketing to appear on the cover art collage alongside Jason, Lucia and Boobie Ike, and again in the portraits Rockstar supplied for a Dazed feature. That billing usually means a substantial story role.
How he connects to Jason and Lucia has not been shown.