I think perhaps a problem with the design might be it's vertical nature. Anything taller than it is wide is, by nature, imposing. Something flat is interpreted as non-threatening.
eg. Zoner ships are flat. BHG ships are tall.
I like the halos and the wings. Perhaps the main body could be shaped like a manta-ray/ Titan AE. wake angel? LINK
Either that, or something perhaps similar to the Ascended beings from SG1? LINK
Just suggestions. I am, afterall, new, so I appreciate that decisions lie in the hands of the seasoned Angels.