But if the mountain explodes sooner rather than later, and Eddis no longer exists, she might go and live elsewhere and marry whomever she likes. She'd still be the last Eddis. OR, she could marry but continue to rule, and continue to be Eddis. That doesn't explain the "last" part, but I take that as an omen that the country of Eddis is not going to outlast Helen. Who knows, maybe all three countries will merge.