Lancer is a main character in Deltarune, posing at first as the main antagonist - you eventually befriend him along the way. While his age is unknown, he seems to have a very young mentality. He's tasked by his father to capture the three protagonists and keep them from achieving their goal. A Bostonian accent is not required, it is hoped for. If you can't do a Bostonian accent, try your best - or perhaps substitute it for a different accent. If you can, please do a take with the accent, without, and how YOU imagine Lancer to sound. 

He's known to be very loud, slightly obnoxious, but also downright lovable. There are very few serious moments he has, but please try to really sell those specific moments he does. Those are the moments that really prove what you can give us as a voice actor. If you are female, you are still allowed to audition - since he is perceived to be rather young, just make sure you actually sound like a young boy, and not like a female trying to pass off as one.  Lancer is a MAIN CHARACTER and he REQUIRES COMMITMENT.