Neoglyptidon is one of the most aggressive damsels--will argue with a mated pair of clarkiis, and few things will. Gorgeous, get fat as a tuna, but keep everybody on the run. Grammas are timid creatures, a basslet, and don't get very big. If you want a flashy damsel, I'd rather recommend a Java Blue devil, maybe a couple of young ones to keep each other busy. I run a damsel tank with a 4.5" golden domino in charge, and I would hesitate to put a blue velvet in there. I fear they'd be like the calico cat and gingham dog of the nursery rhyme, nothing left but scraps.