There's a character in Elden Ring called Rykard who has a silly voice and says "Very well" in a cutscene. This got Joe to start saying "Very well" in his Rykard impression sometimes on stream. There's a character in Zero Escape: 999 called Ace. He noticed that Ace said "Very well" quite a lot, which got him to start doing his Rykard "Very well" even more.[1]

References

  1.     “Joseph Anderson Channel Two” video: “999: Zero Escape - Did You Know...? (Part One)” at 01:12:41.