Jupiter Eagle appears on floors 1 and 2 of Magatsu Inaba within the Midnight Channel. They will attack using Maragion and physical strikes. Once defeated, they may drop a God Tailfeather. Selling 4 God Tailfeathers will unlock the Noblesse Oblige ougi for Yukiko Amagi in the shop.
In Golden, they appear on the floors listed above. They may drop Aurora Quartz for trade at Shiroku Pub.
Jupiter Eagle appears in Area 2 and Area 3 of the second Theater, Junessic Land. Its Eagle Feather is used to unlock the Type-98 Gunto sword for Yusuke Kitagawa, Dai Naginata for the P3P heroine, Platform Sneaks for Chie Satonaka, Hanachirusato for Yukiko Amagi and the Survival Guard unisex armor. Its Eagle Crystal is used to unlock the Sequoia Mace for Ryuji Sakamoto, Marble Axe for Haru Okumura, Great Bird Fan for Yukiko and the Manly Jinbei male armor.