Hmm, I wonder if she is connected to Renta Tsuji. FYI, she was drawn by Fumikane Shimada and was shared in his twitter account a few years ago after the GuP film came out. Here's the tweet: https://twitter.com/humikane/status/694578938157228032
Thanks for the info, couldn't find anything on her. Really had me curious, especially since, yeah, English searches all just came up with THAT Tsuji instead.
Well, they do share the same family name 辻 (Tsuji), plus the facial characteristics are a close match.
As a little bit of extra info, the introduction to the character says "Previous Commander of Chi-Hatan", similar to what it says about Earl Grey being the "Previous Commander of St. Gloriana's".