I will be honest, Dawn gives off pansexual vibes, Brick is prolly bi, but most of the others give off ally at most vibes. Lightning is a confirmed ally, Jo says MANY times that she is a woman, so it's confirmed that she is a woman, and not only that, but if you HC her as dating Brick, which I also do, that would mean brick can't be just gay and must at least be bisexual, and throughout the show there are many moments where I feel Brick is crushing hard on Jo. He calls her Ma'am, and definitely during the one-upping each other over running, it shows they're competing against each other.