Board Thread:Series Discussion/@comment-918376-20160215185116/@comment-26580819-20160224231913

Tetra-chan is better than Marielle! She says so! lol

Everyone (or at least several people) were "dumbed down" in the anime.

^^; Even the light novel puts down Marielle's intellegence (I'm pretty sure Henrietta did at one point), but she's not a moron. She might not be Shiroe smart, but she's good at dealing with people (not manipulating them, but helping and befriending them). She's friendly and helpful.

For the rescue of Serara, I can see her saying "She should be here with us. We can't leave her all alone up there." but I think it would be Henrietta that would do most of the planning and such. Henrietta might even have mentioned it to Marie when she was heading out to see Shrioe, that in their exchange of info, check out about travel. (or whateverit was exactly she talked about with Shiroe & Naotsugu, I don't remember off-hand).