Amanda Evert
Amanda and Lara were once exploring a ruined temple together, when they were attacked by a monster. Amanda activated a door-mechanism, which caused the monster to disappear, but also started the collaps of the building. A huge rock burried Amanda's foot and she could not free herself. Lara managed to stop the door from closing for some, but when Amanda couldn't free herself and the water rose over her head, Lara lost her strenght and had to let go. Amanda probably drowned, while Lara got away.
When you've finished Tomb Raider Legend, you will be able to play again as Amanda. This explains, why in some images Amanda is wearing part of Lara's gear.
from the official site
On the outside, Amanda Evert was a graduate student of social anthropology; on the inside, she was an intense chronicler of the metaphysical. She believed wholeheartedly that the common notion of reality is nothing but a thin, drab layer pulled over the infinite truth of the soul. She studied every religious and mystical system in the world, past and present, and while still at university was already something of an expert on theology and mysticism. She had a pet theory that fragments of a single, long forgotten mystical belief system exist within the rites and rituals of shamanism, witchcraft and many religions. Her dream was to rediscover this supreme knowledge from the past and teach it to people so they could gain spiritual enlightenment. At the time it seemed more like a youthful dalliance than a true obsession; something Lara considered harmless. She was undoubtedly comfortable with exploring beyond the boundaries of scientific inquiry, but she was also a brilliant researcher who was still in touch with the modern world. She was young, a bit bookish, not too self-confident, and a bit of a hippy. Her relationship with Lara is typified by playful philosophical banter; they disagreed, but they crossed intellectual swords without becoming exasperated or angry at the others' firm viewpoint.
Then one day in Peru, while excavating a tomb Lara believed contained the last queen of Tiwanaku, her team of graduate students breeched a new room and all hell broke loose. Lara was the only one to return to the surface, where the team's structural engineer, Anaya Imanu, listened in horror to Lara's story of how a malevolent entity of some kind slaughtered everyone in the tomb, except for Lara and Amanda. But as the two tried to escape, Amanda set off a trap that sealed the room, brought down the roof, and drowned Amanda.