Transformers 2 Pretenders

Transformers 2 may integrate pretenders to its plot: Isabel Lucas, who plays an attractive girl who befriends Sam Witwicky (Shia LaBeouf), has been spotted in a scene that supports the idea that she's indeed a pretender.
In the clips below she looks quite determined and calm even if the other students of the campus, even Shia Labeouf, are running away like hell:

So Alice is likely to be a Transformer hiding inside a human-shaped shell, and according to the rumor she would have an arm that transforms into an energy weapon, a long tongue, and a scanning tentacle.

The first Pretenders were introduced in 1988 as a subline within the Transformers toy line: they were supposedly capable of disguising their robotic forms through the use of synthetic organic outer shells.