"Julie-Su is Knuckles's girlfriend and very distant relative, both of them acknowledging each other as their destined partners through the Echidna sixth sense called the Soultouch. Julie-Su once stated that Knuckles is her soulmate, the only being who makes her feel like she's more than a soldier. Recently, Julie-Su has found a rival for Knuckles' affections: none other than Rouge the Bat. Rouge has vowed to take Knuckles from Julie-Su, despite Julie-Su's warnings. However, Knuckles has not shown any interest in Rouge, and has repeatedly stated that Julie-Su is the only girl he will ever love. Also, since Rouge's interest in Knuckles is purely for her own gain, it is unlikely that she will be able to sway his opinion. Their relationship is later tested, however, by Knuckles' guilt over his actions as Enerjak. Fortunately, the two quickly reconciled and their bond proved as strong as ever. "