The first night of Castle Attack 2021 was a professional wrestling event promoted by New Japan Pro Wrestling (NJPW) that took place on February 27, 2021, at Osaka-Jo Hall in Osaka, Japan, and was headlined by Kazuchika Okada vs. EVIL.
| Actor | Role |
|---|---|
 Kazuchika OkadaKazuchika Okada | Kazuchika Okada |
 Takaaki WatanabeEVIL | EVIL |
 Tomohiro IshiiTomohiro Ishii | Tomohiro Ishii |
 Jamie WhiteJay White | Jay White |
 Toru YanoToru Yano | Toru Yano |
 Steven OwensChase Owens | Chase Owens |
 Hirooki GotoHirooki Goto | Hirooki Goto |
 Alipate Aloisio LeoneTama Tonga | Tama Tonga |
 Nobuo YoshihashiYOSHI-HASHI | YOSHI-HASHI |
 Tevita FifitaTanga Loa | Tanga Loa |
 Hiroshi TanahashiHiroshi Tanahashi | Hiroshi Tanahashi |
 Hiroyoshi YamamotoHiroyoshi Tenzan | Hiroyoshi Tenzan |
 Satoshi KojimaSatoshi Kojima | Satoshi Kojima |
 Tomoyuki OkaGreat-O-Khan | Great-O-Khan |
 Jeffrey CobbJeff Cobb | Jeff Cobb |
 William OspreayWill Ospreay | Will Ospreay |
 Keiji TakayamaGedo | Gedo |
 Shigeki SatoDick Togo | Dick Togo |
 Shoji AkiyoshiJado | Jado |
 Kevin FooteKevin Kelly - English Commentary | Kevin Kelly - English Commentary |
 Chris CharltonChris Charlton - English Commentary | Chris Charlton - English Commentary |
 Adam KostovskiGino Gambino - English Commentary | Gino Gambino - English Commentary |