Guillermo del Toro during an interview with Collider in November 2014, stated that Charlie Day's character Dr. Newton Geiszler & Burn Gorman's character Gottlieb are in the sequel with the respective actors (Day & Gorman) reprising their roles from Pacific Rim (2013) for the sequel. Del Toro commented on it, stating: "Yes. It's quite a different movie from the first one in that, but I think that two of our main characters like in the first one are Burn and Charlie. They are really, really - I mean, honestly, they are probably the guys I have the most fun writing along with Hannibal Chau so just from a purely selfish drive, I like writing them. I love writing for Charlie and Burn. I mean, [Burn's] in Crimson Peak (2015) for that reason, because I love working with him."