Lindsey

You can't see me!

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

Lyndsey is (presumably) a human from the live-action movie continuity family.

Lyndsey is a friend of Mikaela Banes

Fiction

IDW Revenge of The Fallen movie comics

Lyndsey accompanies Mikaela & Sam Witwicky on a trip to the movies, where her "date," Miles Lancaster totally perved on her. Tales of the Fallen issue 1