A difficult question... I think she probably new the risks but didn't have it down as part of the plan.

She did look shocked when she saw the sword sticking out of her just before she died...

In one of the AC magazine clippings, her spirit is shown 'sat' on the lake where her body is, quoting a translation similar to "Was the way I died.. a good way?" - Even that could mean anything. Is she questioning a previous plan where she knew she would die, or reflecting on an unexpected death?