Protection detail... yeah, let's go with that. While Tatsuo has no issue telling Majima and Kiryu that this guy in Ryuuzaki's memories is definitely 100% without a doubt a yakuza, he's not quite ready to divulge that particular detail to Togusa for some reason.

"Maybe. I'm still missing a lot of context for that night, as well as the chunk between Ryuuzaki getting shot and him staggering out of the burning building. But yeah. He jumped up, shoved the other guy behind him, and just... made himself a bigger target I think."