Tifa is often overlooked as a trauma victim in favor of Cloud in FF7AC. She is unfairly scrutinized for her words and in the way she lectured Cloud by some who forget that she's also been through a lot at that point. Like him, she's burdened with loss, grief, and guilt.
Cloud's childhood friend and a member of the Shinra-resistance group Avalanche. Tifa Lockhart harbors tremendous guilt for the lives taken in the group's efforts to save the planet.
She puts on a brave, cheerful face in front of her comrades, no matter the situation.