This is correct. On the anarchy route it's revealed the PC was trained by mark most fatebinders are trained by Calio but since the PC was promising you were part of a 5 person group to train under mark only you survived. Hell the PC can state that Tunon would kill people if they dare walk out of a lecture add to the fact that tunon does not sleep either.
Thanks to tumblr for the images.
I do think it is quite interesting how what belden mark tells you coincides with Myothis letters. Also tunon and mark knew the PC was an Archon/exarch as soon as that spire activated.