Firstborn

The Firstborn is a creature from the IDW portion of the Generation 1 continuity family.

Under the influence of the Grand Architect, Scorponok's mad science yielded what he called the "Firstborn", an organic Decepticon powered by a spark.

Fiction

IDW Generation 1 continuity

Plot details for Kill All 'Cons follow. Spoilers have expired, you may remove this tag

Following Scorponok's botched escape from the Garrus-9 detention facility, he was rescued after a fashion by the mysterious Grand Architect, Kill All 'Cons who was able to influence the scientifically-minded Decepticon into carrying out a series of experiments aimed at accelerating the evolution of his species, yielding strange hybrid beings such as the Treecons and Infinites. The Ties That Bind

Using the power of the Magnificence, Scorponok developed the Firstborn as the first step towards rejuvenating the dying Cybertronian race; bereft of hot spots or the life-giving power of the Matrix, no new sparks could be formed and Cybertronians could not reproduce the way they once had. Instead, the Firstborn carried a Spark within her derived from a Decepticon "volunteer"; once she grew and reproduced, the Spark within her would also be carried into the next generation, and from there the Spark could be extracted and placed back into a conventional mechanical chassis. Until that time, Scorponok carried her gestation pod inside his chest.

Following their confrontation with Scorponok, the Scavengers and Grimlock were able to overpower the Decepticon scientist; Grimlock was partial to killing the child with its creator, unwilling to let Scorponok win, but Misfire convinced him otherwise, and they took the Firstborn with them as they escaped from Scorponok's Worldsweeper. After pushing his Decepticon allies through a transmat portal to safety, Grimlock opted to store the Firstborn in his empty chest cavity, wryly noting that it was the safest place in the universe. Kill All 'Cons