>>13311703She's a teacher in that image, teachers get emotional during graduation too.
>more importantly she's crying here while on the island she seems to be this powerful beingPrevious episode said that she has a completely different personality on the Island than she did in the real world, which doesn't line up since none of the students had their personalities change as a consequence of being spirited away. Also in the latest episode there's a line about how only students got spirited away and that her being there is an anomaly. So I doubt that she's actually the teacher, probably some entity taking her form as a catalyst.