Tsukasa does not think his fame so great it transcends worlds. It must be part of Cole's abilities then. Unless it's a statement that he knows Tsukasa is glad to meet him. That too would rely on abilities. Regardless.

"Cole," Tsukasa says, "A pleasure. I hope to keep your acquaintance once we leave this room." He smiles, as he writes a note about Cole (from Thedas) on a sheet of paper in the notebook, tears it out, and tucks it into his clothes. He also takes out his relic to record the same electronically. Even should he forget Cole, he will remind himself.