[Sunred]

UW Vul Eagle/Kawashima was played by Catcher Nakazawa, who portrayed Daita/Kong in the Wizard and Fourze crossover movie as well as many small roles in shows such as Zi-O, Orb, Geed, Kyoryuger, etc.
UW Zyuoh Eagle/Iwashita was played by Ryuma Hashido who most notably portrayed Tasogare/Kamen Rider Eternal in Kamen Rider Gotchard, Eida in Kamen Rider Zero-One, and Kamaitachi in Kakuranger: Act Three (the 30th anniversary special). He's also a suit actor who notably suit acted as Kamen Rider Eternal in Gotchard, Wingman in Wingman, and Kingranger in King-Ohger in Space.

Both have the Japanese word for eagle (washi, わし, 鷲) hidden in their names.
Kawashima
Iwashita