Uma Arachnis

Uma Arachnis was a Spider ninja and ally of Ixis Naugus, having been trapped in the Zone of Silence with him. Uma remained in the Zone for an unknown period of time following her mysterious exile to that realm, before finally emerging with Naugus and Warlord Kodos following the death of Dr. Robotnik. She and Kodos were imprisoned at Devil's Gulag for a time after being trapped in crystal form, but were then liberated by Dr. Eggman's satellites. The pair briefly worked with other criminals before becoming a separate team, and in the end Uma turned on Kodos. After being exposed to pollution from the city of Robotropolis, she would eventually die, thought not before laying a half dozen eggs that later hatched into the Arachne.

Ixis Naugus
Sent to the Zone of Silence at an unknown time and for unknown reasons, Uma Arachnis was among the many exiles to the Zone who swore allegiance to Ixis Naugus in exchange for his magical protection, the others including Maximillian Acorn, Warlord Kodos, and Feist. Granted the ability to shift between organic and crystalline form, Uma could become an even more formidable opponent and was able to retain her sanity while in the Zone. Eventually, she escaped alongside Naugus and Kodos after the Knothole Freedom Fighters dispatched a probe into the Zone, and at Naugus' behest battled the likes of Sonic the Hedgehog and Geoffrey St. John. When these enemies proved too much for her and Kodos, Naugus transformed Uma to make her virtually indestructible. Sonic quickly brought an end to her attack, however, by shattering Naugus' crystal scepter, ending the magic that allowed her to move while crystallized. She and Kodos were then moved in their immobile forms to Devil's Gulag, abandoned by their supposed benefactor. (StH: #53, #54)

Snively Kintobor
When a blast from one of Dr. Eggman's satellites allowed the prisoners of Devil's Gulag-namely Snively Kintobor, Sleuth Dog, Drago Wolf, Nack the Weasel, and the Fearsome Foursome-to escape, they brought Kodos and Uma along with them. A second satellite signal-or perhaps the dissipation of Ixis Naugus' magic-reanimated the two and restored them to their original forms. Swearing loyalty to Snively, the leader of the group, they joined the others in kidnapping Nate Morgan, whose technical genius Snively hoped to use in his takeover attempt. They fought with the Knothole Freedom Fighters in Mobotropolis, and were able to defeat them and take Nate hostage. Uma would then fight the Royal Secret Service briefly after they came to Nate's rescue, but managed to escape with Kodos on Sonic's stolen biplane. (StH: #63, #68, #69, #70)