The Stereo Hearts Club are a group of rogue Reverbs who act as the rivals to the main cast, almost like their "Team Dark." The members of this small but tight-knit friend group are as follows:

Logan "Lo" Zollhouse - A cool, but competitive racer with powers over Gravity and a set of Gravity Skates, developed using the forbidden technology and research of his mysterious family line. His races and near mirror-match rivalry against Micah Allbridge puts him at the forefront of his group and the main force driving the SHC to compete against the HOUND Unit so often.

Goya Oñue - A 7ft tall man made of lashings and wraps, this surprisingly protective and gentle giant is a misunderstood being who has come to terms with changed figure after going through what he has dubbed the "Lash Install," a complete reformatting of his body and mind where the latter has permanently traded places with the former, turning his body into a permanent reflection of his psychic powers to unfurl and unwrap his own body.

Donna Allbridge - The calm, collected leader of the group, she's the one who keeps everyone's ESP-filled heads screwed on in times of crisis with her uncanny ability to "fix" and heal both objects and people at will, as well as her ability to float. Donna is the cousin of Micah Allbridge on the HOUND Unit, and served as an inspiration when she left to seek the same glory her previous family members each brought to the generational table.