Mengel is aCatharsian from theIDW portion of theGeneration 1continuity family.

I'm a very busy woman and I haven't got all day
It won't cost much
Just your grief!

Mengel deals in rare and exotic equipment and goods. She isn't a very social type, but she has connections and has someextremely rare and valuable items that are for sale...for the right price.

She's apparently an associate ofAgonizer, who doesn't have very good things to say about her or her race.

Fiction

2005 IDW continuity

Mengel settled inTroja Major'sHowling Town and eventually became aligned with the mysteriousGrand Architect. Her colleagueWipe-Out had a low opinion of her, unflatteringly comparing her toStarscream.Chasing the Infinite

Under undivulged circumstances, Mengel came into possession of theMagnificence and used its vast stores of knowledge to genetically engineer an "Infinite" eventually contacting and delivering it toFlame.Chasing the Infinite On the side, she used the artifact to learn how to revive the dead and marketed it off as the "Resus Cradle". In late 2017, she was approached byNautica for usage of the miraculous artifact to revive her friendSkids.An Axe to Break the Ice After convincing Nautica to sell her grief for Skids and friendship with Velocity, Mengel was called away by Flame who demanded the Cradle. Though the Catharsian attempted to bluff her way out of the tight spot, Flame saw through the ruse and ordered the compound ransacked, eventually reclaiming the Magnificence.Chasing the Infinite

Fearing for her life, Mengel fled toAgonizer with the two comparing notes on the Magnificence. As Agonizer realized theCybertronian heritage behind the relic, Mengel was targeted by theBlack Block Consortia who messily ended her.The Ties That Bind

Notes

• Mengel's name is derived from that ofJosef Mengele, real-life progenitor of the ubiquitous "Nazi mad scientist" trope.