Disclaimer: SquareEnix owns the recognisable bits.
Tifa.
Comrade: a person who shares in one's activities, occupation, etc.; companion, associate, or friend.
She'd been thinking about what he'd said.
About her friends.
About the reason she still existed.
And it made sense.
She'd given her light to Cloud, and that was all he believed her to be, so she should've disappeared.
…but she hadn't.
Not entirely.
She was still in limbo, and without Cloud, she couldn't connect to the world.
But she hadn't disappeared.
Because of her friends?
Were they even still alive?
Yuffie was, she'd seen her.
Aeris? Cloud had gone looking for Aeris thinking that Aeris would need him.
…turns out, Tifa had been the one to need him.
Is that what it was?
She clung to Cloud now, because he was the last thing she remembered clinging to when she was alive?
What about her other friends?
Cid, Red XIII, Vincent and Barret? Were they alive? They weren't here in limbo, she knew that much.
It hurt too much to think about them.
Maybe that's why she hadn't.
But… if she wanted to live…
…then… maybe…
…she should start.
Perhaps it wasn't her friends who had to believe in her.
Perhaps she had to believe in them.