Ben is one of the boys that Edwin meets in Vaction with a Derek, the other being Sven.
Ben appears to be quite friendly as he let Edwin join him and Sven play crocket with them. Oddly he seems to be a fan of destruction and Injury as he got pleased with Ediwn hitting the crocket ball through the window (much to felica's horror) And Edwin falling of the paddleboat.
Not much is known about his life before the movie but the movie hints he's been good freind with Sven and is great at dancing.
He developed a minor crush on Casey during Vaction with Derek however it is obviously only due to her attractive appearence. Casey doesn't seem to understand the crush and gets slightly unconfortable. He and Sven joined the fund raiser mostly to impress her.