She-Ra: Princess of Power (1985)

S1E5 Battle for Bright Moon

After Hordak and Skeletor snatch Adora, she breaks free and transforms into She-Ra. The escape makes her realize that staying on Eternia puts her loved ones in constant peril. Choosing to protect them, she heads back to Etheria, with He-Man by her side. They arrive just as the Rebel forces are poised to seize control of Bright Moon, throwing them into the middle of a pivotal moment for the kingdom.