The final, and most popular, protoform frame Alice utilized before the incident prior to her escape and massive weapons upgrades. The 'teen' stage as according to her mother/creator's notes. Alice personally enjoyed using this form since it seemed the male technicians on the installation were quite eager to assist her in any tests. And a few females too. She may have enjoyed the attention but didn't understand the reason why until much much later. There is a strong possibility that this is what she looks like under all her armor if encountered.

Visual data provided via  boag