Astrid is an interesting character. Astrid was originally an alt universe version of Thunder Faith where T. Faith was a harpy, but I loved Astrids design too much, and made Astrid her own character, hence why the two look so similar. As for Astrids name, a friend suggested Astrid, from the fear of thunderstorms, Astraphobia, for Thunder Faith. However, I never gave Thunder Faith that name, and it simply collected dust. However, when making Astrid, I recalled the name and gave it to her. Thanks Bagel!
Astrid is a fun little character who I'm glad I've made into their own thing, rather then just being a recolor of Thunder Faith. As for the type of bird Astrid is, once more, I didn't actually have a bird in mind when making Astrid. I just made Astrids design and was pretty happy with it! After looking up "Black bird with long tail," I got the Widowbird.