Iron Bugs were small metal bugs that Virus could produce. They lived in her hair and did whatever she thought. They had no mind of their own and could attach to a fey or human to control it's mind and make it a slave to Virus's will. One such bug was attached to Ash after he was captured by Virus's guards. He was the only non-Iron fey to be "successfully" controlled. All the same, it was slowly killing him and hurting him excruciatingly. He came close to killing Meghan while controlled and froze Meghan's parents and home. They all died with when Virus was killed. Read Virus *click this* for more info.