The latest issue of Empire Magazine has a segment dedicated to the upcoming sequel to Guillermo del Toro's Pacific Rim, officially titled Pacific Rim Uprising and throughout that segment we are given new details on John Boyega's character - Jake Pentecost, along with a new movie still featuring Boyega and co-star Scott Eastwood:
At the start of the film, he [Boyega's character] is an absolute crook. There are rogue Jaegers where people have collected spare parts and made their own machines. Jake is stealing from people and selling Jaeger parts.
Boyega also recounts sliding 20 feet down the side of a Jaeger arm while filming. You can check out more from the issue and get yourself a copy over at Empire.