If I recall right, in one of the events that could be interwined with the current plot, Teppei asked Zaus for the exact location of a Golden Cookware that was in possession of NEO. Considering what kind of shit you have to go through in order to collect the materials that are necessary to make more cookware, I think Teppei might wish to avoid fatal consequences for the ones that are sent to get the materials. He knew about the requirements to capture PAIR, so he must have also learned out of ANOTHER as well. Since Teppei is no longer under the control of Joa's bacteria (and is very likely he never was in first place), right now he must be heading to Area 6 to deliver the cookware, if he found it.
Also, Jiji is not telling all the truth there. He said the gourmet knights will still age at normal rate, but how is that possible when Komatsu said they had spent decades in the World of Souls and anyone can see they did grow older.
Teppei was under control up until Jirou yelled at him like a mad man.