Leiko Tanaka (麗子 田中 Reiko Tanaka), alias Go-Go Tomago, is a member of the Japanese super-team, Big Hero 6. She is young and highly aggressive, with little patience for others, but a very strong will, someone who does not give up easily. She is also known as the hothead of the team as she tends to act on her aggressive tendencies without considering the results. Go-Go was apparently drafted into BH6 rather than facing jail time. The nature of her criminal convictions is unknown. She joined to prevent Everwraith (Earth-616) from slaughtering millions in downtown Tokyo. During the battle, Big Hero 6 was joined by Sunfire, Japan's premiere super hero and a mutant with the ability to super-heat matter into plasma, who was instrumental in the Everwraith's defeat.
| Title | Year/Month |
|---|---|
| Sunfire and Big Hero Six #1 | 1998, September |
| Sunfire and Big Hero Six #2 | 1998, October |
| Sunfire and Big Hero Six #3 | 1998, November |
| Alpha Flight Vol 2 #17 | 1998, December |
| Alpha Flight Vol 3 #9 | 2005, January |
| Civil War Battle Damage Report #1 | 2007, May |
| Big Hero 6 #1 | 2008, November |
| Big Hero 6 #2 | 2008, December |
| Big Hero 6 #3 | 2009, January |
| Big Hero 6 #4 | 2009, February |
| Big Hero 6 #5 | 2009, March |
| Official Handbook of the Marvel Universe A-Z #14 | 2010, June |
| Amazing Spider-Man #685 | 2012, July |
| Amazing Spider-Man: Ends of the Earth #1 | 2012, July |