Lindsey

Lindsey is (presumably) a human from the live-action film series continuity family.

You can't see me!

_{This character has no official visual representation in any Transformers product or media... yet, at least.}

Lindsey is a friend of Mikaela Banes.

Fiction

IDW Revenge of The Fallen movie comics

Lindsey accompanied Mikaela and Sam Witwicky on a trip to the movies, where her "date", Miles Lancaster did not keep his hands to himself despite warnings prior. This severely angered both Lindsey and Mikaela. Tales of the Fallen #1