Ultraman Boy (ウルトラマンボーイ Urutoraman Bōi) is an Ultra from the Land of Light.
Ultraman Boy stars in this series where he learns about past Ultra Warriors, Kaiju, and defense teams.
Ultraman Boy has three brief cameos in this movie. He is first seen fighting and losing to a rookie Ultrawoman while training in the Ultra Coliseum. Later, when Ultraman Belial attacks the Land of Light, Ultraman Boy can be seen hiding and shouting in fear "Oh! This is terrible!". Afterwards, he was presumably frozen along with every other Ultra (excluding Ultraman, Ultraseven, Ultraman Mebius, Ultraman Leo, Astra, Ultraman King, and Ultraman Zero) when Ultraman Belial stole the Plasma Spark. During the film's resolution, he is seen standing between Ultraseven 21 and Ultraman Neos listening to Ultraman King's speech.
- Height: 24 m and growing
- Weight: 6,000 t and growing
- Age: Ultra equivalent of an Elementary School Student
- Home World: Land of Light, Nebula M78
- Flight Speed: Not yet learned
- Favorite Subject: Ultra Science
- Disliked Subject: Physical Education
- Likes: The Ultra Heroes, Yullian (Crush)
- Goals: To become a member of the Space Garrison (Called a Space Ranger), learn how to fly.
Ultraman Boy reappeared in the new puzzle role-playing game for mobile devices, Ultraman Galaxy. He is a C ranked card, which means he is quite common.
- The original Ultraman Boy suit was reused for his appearance in the Ultra Galaxy movie.
- Ultraman Boy, besides being the youngest Ultra known (until the appearance of an Ultra Baby in the Ultra Galaxy movie) is the only Ultra known to not be able to fly due to his age.