My concept of what a Cybertronian Spark looks like and the first animation I've ever done. The description below is extrapolated from canon info across multiple continuities, which I have compiled together, expanded where necessary, and wrote down here to give a clearer view of what is most likely true (at least as far as I've been able to research anyway).
The Spark is a Transformer's soul and life force which resides within the chest, typically in about the same location as the human heart and is protected by the Laser Core, the spherical shell that protects the Spark and connects it to the neural system. It is literally the life essence of a Transformer. A Spark is a roughly fist sized (for the mech in question) glowing ball of energy, typically blue white in color, which emits a continuous cyclic hum not unlike that of a star. The glow of a Spark pulses rhythmically with the sound of the hum, louder/brighter quieter/dimmer.
The actual structure of the Spark is oddly unique, consisting of a complex and apparently organized lattice of plasma energy discharging continuously in a stabilized cycle within a sort of malleable solid plasma membrane. This structure can be free floating and self contained, but is extremely fragile and easily punctured or damaged. This is why a suitable Laser Core is formed around a Spark to protect it within a Transformer’s body.
Further information on Transformers Sparks can be found here -->
More Transformers information files can be found here --> [link]
I taught *BonitaOnePrime
how to make her own, which can be found here -->
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