Directory: Characters → Humans → Tournament fighters

Directory: Characters → Humans → Humans with Saiyan blood

Directory: Characters → Z Fighters

"I am the youngest child of my whole family. I am the Ultimate Fighter!"

— Dragon Ball Z: Bojack Unbound

Kayla (ケイラ, Keira) is the youngest daughter of Shaun Spencer and Danielle Johnson of the series, she's the younger sister of Zesmond, niece of Marcus Spencer and Arella Johnson, and younger cousin of Alyson and Nathaniel. She's the daughter-in-law of Mr. Satan and Miguel, the sister-in-law of Videl, the wife of Jimmy, the mother of Melissa and Tommy, and the aunt of Pan. She's the mother-in-law of Trunks, and the grandmother of Matthew. She's also the youngest granddaughter of James and Mary, the youngest niece of Doris, Maria, and Haylie, descendant of Kaylah Spencer, and great-great granddaughter of Katherine Spencer. She's the first Human with Saiyan Powers and Abilities as the Eternal Dragons: Shernon and Porguna Jinchuriki Host with Glowing Dragon Balls Birthmarks to appear in the series. She was named after her ancestor Kaylah Spencer.

More like her family and friends, even Gohan and Jimmy, Kayla lacks the self-confidence, and passion for fighting spirit and prefer to be stronger enough to defend and protect her family, friends and love ones from dangers and future villains. She's afraid of Frieza, Cell, Buu, and other villains first, she's letting go of her fears and fight back. Nevertheless, Kayla joins with Gohan and Jimmy fights alongside the Z Fighters in the defense of Earth for much of her life as the youngest fighter in their group, she's married Jimmy, and spend with her husband and children at the end of Dragon Ball Z.