I was wondering if it would be appropriate for a Dead Master(Black Rock Shooter 2012) to join in on this gathering? I know she's not a vocaloid in her own right, but a character from a series inspired by a vocaloid/a vocaloid song. There's no gathering specific to that series(or series set), but I also hate to be that guy who very obviously doesn't belong in a gathering. I'm not 100% on the etiquette for gatherings(I havent been comfortable being in gatherings until my last few cons and am still picking up nuances), so I thought I would ask. I'm okay with either answer, I'd just like to know!