I would love this as well. I know the Horoku can carry some small/medium creatures, I was a little surprised to accidentally pick up a Phiomia with mine because I thought that would be too big! I don't have an Aura Seeker yet but the Beastiary says they can carry things that an Argent can carry as well. Roks can't carry things which I totally spaced when reading about them, tamed one hoping to carry some creatures and could only shoot spikes instead lol. My best guess is that if the Beastiary doesn't specifically say they can carry things or lists a control key to pick things up, that they can't carry anything. In most situations fliers can't be carried, so I would hazard to guess the fliers of this mod can't be picked up.