Uma Arachnis

Uma Arachnis was a Mobian 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. Ivo Robotnik. She and Kodos were imprisoned at Devil's Gulag for a time after being trapped in crystal form, but were then liberated by Robo Robotnik's satellites. The pair briefly worked with other criminals before becoming a separate team. Uma turned on Kodos when she learned the latter no longer needed her after obtaining the Sword of Acorns, thus she stole and hid the sword. Uma eventually died due to prolonged exposure to toxic radiation pollution from living under the city of Robotropolis, though not before laying a half dozen eggs that later hatched into the Arachne.

Soldier of 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. (StH: #53, #66)

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. During the fight, Uma attempted to pull King Max off his sick bed and shatter him, as his body was mostly crystal, but was stopped by St. John. When Naugus realized his enemies proved too much for her and Kodos, Naugus transformed them both into their crystal forms, making both virtually indestructible. Sonic quickly brought an end to her attack, however, by shattering Naugus' crystal sceptre, 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)

Joining Snively and the Convicts
When a blast from one of Robo Robotnik's satellites allowed the prisoners of Devil's Gulag - 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 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, Winged Victory. (StH: #63, #68, #69, #70)
 * It is assumed it was the work of Robo-Robotnik's satellites that restored Kodos and Uma Arachnies to their organic selves. However, this was never officially confirmed in the comics, and it is possible it was due to Naugus' magics wearing off due to him being trapped in the Zone of Silence.

Quest for the Sword and Death
Some time later, Uma and Kodos found themselves fighting against one another, both becoming deranged and terminally ill due to the toxic effects of prolonged exposure to radiation poisoning in Robotropolis. While Uma the Sword of Acorns from Robotropolis and gave it to Kodos, Uma later stole it back from him while he slept. (StH: #93)



Uma managed to hide the sword, but Kodos continued to chase and attack her. Uma first caught Sonic in her web, but instead of attacking him, she used him as bait to lure in Kodos and knock him unconscious. After this, she cut Sonic from the webbing and allowed him to take Kodos back to Knothole while she vanished. Unknown to Sonic, Uma had just laid her eggs in a nearby tree. Uma took this time to hide the Sword, realizing that she could not allow it to fall into the hands of the deranged Kodos should he return. (StH: #95)

A few days later, Kodos awoke after being treated in Knothole's hospital for his own radiation poisoning. Escaping, he managed to located Uma Arachnis and attack her. Uma, succumbing to the toxic effects of radiation poisoning from when she was hiding in Robotropolis, was no match for Kodos. Before she died however, Uma managed to tell Princess Sally, who was searching for Kodos with Tails and Rotor, where she had hidden the Sword of Acorns. Uma died shortly afterwards from the radiation poisoning and wounds obtained from Kodos. (StH: #99, #100)

Legacy
Uma's memories were passed down into her six children, the Arachne, making them inherit her fixation with the Sword of Acorns, her loyalty towards Ixis Naugus, and her ninjitsu skills. (StH: #111)

Abilities
Uma was a skilled martial artist and professional ninja, mastering the skills of stealth and various weapons. While working for Ixis Naugus, Uma could also turn herself into crystal, becoming nearly invulnerable. She could also use webbing to trap opponents. (StH: #53, #95)

Background Information

 * She may have been a member (or the leader) of the unnamed fourth clan that serves the Bride of Four Houses, as hinted in (StH: #95, #200, #202).