Huh, I guess my comment didn't get through all the way. Ah well honestly I narrowed it down and if it COULD be anyone Brendon was thinking of, even if its weird that they are in the room at the same time, I think it's Ryan or Spencer. Ryan more likely to me. OR if it can't be anyone he was thinking of, I say it's Shane Valdes or Eric Ronick, Shane probably because he MOST LIKELY could have been there when Brendon got his tattoo. If it isn't any of them I am gunna explode.
Author's response
It is either Spencer, Jon or Ryan, but that's the most you're getting out of me :D