Theory number idk bcuz there's a lot i've made but as we see there is a letter to onyx from void, which are the two wolves from Bl00d//water, and because of that, it tells me that Glowworm is somehow related to them, which was kind of obvious from his dreams, but maybe this was put there because Glowworm finds this letter and realizes the wolves are spying on him, trying to maybe k1!! him or something. Additionally, this song seems to be about a strong bond between to wolves, and about being the one to rescue someone. They clearly have a strong bond together, but maybe Firefly saves Glowworm from Onyx?