Life Spark is apparently an Decepticon. His personality or characteristics are unknown.
Marvel UK comics
- "Life Spark" arises from an early script draft of the Movie. After receiving mortal wounds in battle with Optimus Prime, Megatron's Life Spark (his essence, which leaves his body after he dies, and is found by Ingestor--the early script's version of Unicron), and those Life Sparks of other ancient Decepticon leaders who were enshrined in the Decepticon Hall of Heroes (still seen in the completed movie) were given new forms. Thus, Cyclonus was originally to have been created from the Life Spark of one of these ancient Decepticons, hence the reference in "Target: 2006".