Zynthia
From superman.nu: Supermanica
Zynthia
The lovely blonde-haired teenager from the planet Xanthu, and former girlfriend of Thom Kallor, aka Star Boy of the Legion of Super-Heroes. In her only recorded appearance, Zynthia helps Superboy to teach Lana Lang a much needed lesson about jealousy (Adv No. 282: "Lana Lang and the Legion of Super-Heroes!").