If Seth Rich wasn't Panda, then who is Panda?

"According to megupload's Kim.Com, Rich used code name Panda and looking to move a treasure trove of DNC and Clinton information to wikileaks two years ago."
https://247sports.com/college/fresno-state/Board/102994/Contents/Seth-Rich-DNC-leaker-Who-done-him-in-The-DNC-54749037/

"Seth Rich’s social media handle was “panda” and it was known among his friends in the DNC. Did Hillary publicly threaten to “shoot the panda” in a Vanity Fair article of January 24, 2016? Julian Assange has already strongly suggested it was Seth Rich. Kim Dotcom, is willing to testify it was Rich."
http://impiousdigest.com/seth-rich-was-the-panda-dnc-mocked-him-with-memorial-bike-rack/

"He called himself Panda. I now know that Panda was Seth Rich.

Panda advised me that he was working on voter analytics tools and other technologies that the Internet Party may find helpful.

I communicated with Panda on a number of topics including corruption and the influence of corporate money in politics."
http://kim.com/

"He went on to write that in 2014, a person using the pseudonym "Panda" contacted him about starting a U.S. branch of the Internet Party, a political group Dotcom founded in New Zealand in 2014 focused on internet freedom and privacy. "I now know that Panda was Seth Rich," Dotcom wrote."
https://www.newsweek.com/seth-rich-kim-dotcom-murder-wikileaks-fox-news-sean-hannity-russia-hillary-614307