[quote=@Jangel13]
Yes an angel which is explainable and reasonable while an elf. I can only see an elf coming from the familiar forest I wouldn't know any other context they would show up. 
[/quote]

The same context in which a vampire/dhamphir and a nekomata would. 
There are more species in High School DxD apart from the angels, devils and demons. They even go a bit into it in the anime. So a half-elf would be fairly fine so long as they were fit into the story. Plus with that human half, a sacred gear is perfectly reasonable. 

I haven't exactly gone over the CS, but essentially, these points you brought up here in the OOC tab, were quite easy to reply to. But you know. I'm just giving an opinion.