Captain America (vol. 1) #210 (June 1977):
“Showdown Day!”
by Jack Kirby, Mike Royer

Captain America (vol. 1) #210

Title: “Showdown Day!”

Medium: comic

Cover date: June 1977

Publisher: Marvel
Written by: Jack Kirby
Art by: Jack Kirby, Mike Royer

15 characters in this story:

(Click links for info about character
and his/her religious practice, affiliation, etc.)
Pub. #
Captain America Captain America (Steve Rogers)
(lead character)
CBR Scale: I Protestant
Redeemers; Secret Defenders...  Marvel Timely 5,992
Arnim Zola Arnim Zola villain
CBR Scale: M Nazi
Skeleton Crew (ally) Marvel 73
Falcon Falcon (Sam Wilson) hero
CBR Scale: S Baptist
black; SHIELD Super-Agents...  Marvel 531
S.H.I.E.L.D. S.H.I.E.L.D. supporting character group
  [government agency; intelligence agency...] Marvel 1,188
Red Skull Red Skull (Johann Schmidt)
CBR Scale: D Nazi
Axis Mundi; HYDRA... 
[Captain America's arch-nemy]
Marvel 298
Agent 13 Agent 13 (Sharon Carter) supporting character hero
CBR Scale: S Christian (denomination
Femme Force; S.H.I.E.L.D. Marvel 262
Primus Primus villain
CBR Scale: I N.A.
Thunderbolts Army
[artificial humanoid created by Arnim Zola]
Marvel 13
Doughboy Doughboy villain
CBR Scale: I N.A.
[formerly merged with Primus] Marvel 5
Donna Maria Puentes Donna Maria Puentes supporting character
  Hispanic; The Avengers (staff)
[former rebel; cousin of Hector Santiago (Swine)]
Marvel 16
Nelson supporting character
[concerned about File 116]
Marvel 4
Monsters from File 116 Monsters from File 116
CBR Scale: R N.A.
[genetically engineered monster created by Arnim Zola] Marvel 2
Cyrus Fenton
(someone disguised or dressed as, pg. 11, 16-17) 
supporting character
  [wealthy man killed, impersonated by Red Skull] Marvel 4
Frankenstein's Monster Frankenstein's Monster
(mentioned, pg. 1 ,10) 
  First Line; S.H.A.D.E.... 
[Uses name Frankenstein in tribute to his creator.]
Marvel DC 990
Victor Frankenstein Victor Frankenstein
(mentioned, pg. 1 ,10) 
supporting character
CBR Scale: S Lutheran
[creator of the Frankenstein Monster] Lackington, Hughes, Harding, Mavor & Jones 156
Uncle Sam Uncle Sam
(mentioned, pg. 17, panels 2-3) 
  [from American folklore] Marvel 17