Lara is not alone in her travels on this adventure; some faces that she will meet are friendly whilst others are not so much. All will give the player the choice of a new ability; some are mandatory whilst other characters can be declined. When these characters will appear are also random.
Anaya appears in the Peruvian set of levels. She is a mandatory character that will give players the choice of two abilities: one is always 'Anaya's Blessing', a health ability to heal 40% of your total HP. The other ability is often the 'Health Boost' ability but can also be something different.