Panda was SR’s personal taken nickname - it was interspersed among numerous things dug through after 187. There was also an early ref to WikiLeaks having obtained DNC things from a “bear” - via Kim Dotcom, I think, probably the only thing he’s ever said that proved correct, which most assumed “bear” meant Russians, but “bear” = “Panda” = SR.
In homo-speak, large, somewhat unfit gay men are known as “bears”.
I think Kim DotCom would fit that vocable while SR would not. And, yes, Pandas are bears. But, “bears” are not always Pandas.