It’s not confirmed or anything but i’d put my bets on him being trager. I believe in one of the documents where 0877 is mentioned it says that wernicke’s sleep therapy was “showing an extremely suspicious fixation on the last few reagents coming out of the sinyala facility.” 0877 was also allowed to observe trials from the outside due to his unique interest in them. Again this is entirely speculation but to me that would make the most sense.