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- "Strength of the Ninja! Ninja Steel Yellow!"
- ―Ninja Steel Yellow's roll call[src]
Calvin "Cal" Maxwell is Ninja Steel Yellow, the Yellow Ranger of the Ninja Rangers.
History
At a young age as mentioned in Drive to Survive, Calvin once drove his go-cart on a track when he lost control and swam out of a duck pond. Since the accident, he's had a fear of driving. However, Calvin got over his fear of driving when he saves the team at the end of the episode.
Calvin was first seen when he fixed his truck, when he saw Sarah riding on her hoverboard causing him to move his head down as she jumps. TV STORY-Return of the Prism
Split History
Shattered Grid
When events set into motion by Lord Drakkon caused the timeline to split into pocket universe, each anchored on a powerset, the Ninja Rangers were split off into their own pocket universe. Lord Drakkon then attacked Brody. Like the rest of the Rangers, he finds Brody locked in battle with Drakkon and helps.
When the timeline was restored, so COMIC STORY- Mighty Morphin Power Rangers 2018 Annual
Personality
Calvin is a cool and confident gear-head who loves building anything mechanical - especially vehicles. He’s also rather lackadaisical, at times too much for his own good! Calvin is the boyfriend of Hayley Foster, who is Ninja Steel White.
Forms

Ninja Steel Yellow
Arsenal
- Ninja Battle Morpher
- Ninja Power Stars
- Yellow Ninja Power Star
- Ninja Star Blade
- Ninja Blaster
- Mega Morph Cycle
Zords
Appearances: NS Episodes 2-22, SNS Episodes 1-22

Ninja Master Mode
When combined into the Megazord, the Rangers need to access Ninja Master Mode in order to operate it. Using the Ninja Master Mode Star, the Yellow Ranger can access the Ninja Master Blade to perform attacks with the Ninja Steel Megazord. Without it the Megazord is without energy.
Arsenal
Zords
Appearances: NSt Episodes 3-14, 16-19, 21

Super Ninja Master Mode
When combined into the Megazord, the Rangers need to access Ninja Super Steel Mode, an upgrade version of Ninja Master Mode, in order to operate it. Using the Super Ninja Master Star, the Yellow Ranger can access the Ninja Master Blade or the Ninja Super Steel Blaster to perform attacks with the Ninja Steel Megazord. Without it the Megazord is without energy.
Arsenal
Zords
Appearances: SNS Episodes 2-9, 11-19, 21, 22
Morph and Roll Call
Behind the Scenes
Portrayal
- Calvin is portrayed by Nico Greetham. In Super Sentai footage from Ninninger, his suit actor was Yasuhiro Takeuchi (竹内 康博 Takeuchi Yasuhiro).
Pre-Portrayal

Chantz Simpson as the Yellow Ranger
- Originally, Calvin was to be played by Chantz Simpson, as announced at Power Morphicon 2016. However, in September 2016 the role was recast for unrevealed reasons.
Notes
- Calvin is the only Ninja Steel Ranger who, during his respective seasons, never mentions his family members, nor are they seen.
Appearances
Power Rangers Ninja Steel
- Episode 1: Return of the Prism (cameo)
- Episode 2: Forged in Steel
- Episode 3: Live and Learn
- Episode 4: Presto Change-O
- Episode 5: Drive to Survive
- Episode 6: My Friend Redbot
- Episode 7: Hack Attack
- Episode 8: Gold Rush
- Episode 9: Rocking and Rolling
- Episode 10: The Ranger Ribbon
- Episode 11: Poisonous Plots
- Episode 12: Family Fusion
- Episode 13: Ace and the Race
- Episode 14: The Royal Rival
- Episode 15: The Royal Rumble
- Halloween Special: Grave Robber
- Episode 16: Monkey Business
- Episode 17: The Adventures of Redbot
- Episode 18: Abrakadanger
- Episode 19: Helping Hand
- Episode 20/Finale: Galvanax Rises
- Christmas Special: Past, Presents, and Future
Power Rangers Super Ninja Steel
- Episode 1: Echoes of Evil
- Episode 2: Moment of Truth
- Episode 3: Tough Love
- Episode 4: Making Waves
- Episode 5: Game Plan
- Episode 6: Attack of the Galactic Ninjas
- Episode 7: The Need for Speed
- Episode 8: Caught Red-Handed
- Episode 9: Outfoxed
- Episode 10: Dimensions in Danger
- Episode 11: Love Stings
- Episode 12: Fan Frenzy
- Episode 13: Prepare To Fail
- Episode 14: Sheriff Skyfire
- Episode 15: Tech Support
- Episode 16: Car Trouble
- Episode 17: Happy to Be Me
- Halloween Special: Monster Mix-Up
- Episode 18: Magic Misfire
- Episode 19: Doom Signal
- Episode 20/Finale: Reaching the Nexus
- Christmas Special: The Poisy Show
Mighty Morphin Power Rangers (Boom! Studios)
Power Rangers Dino Fury
- Season 1
- Episode 8: Unexpected Guest (archive footage only)
- Season 1
See Also
- Nagi Matsuo - Super Sentai counterpart in Ninninger. See comparison page.