First Spinjitzu Master

Zhekoro, better known by his moniker the First Spinjitzu Master, is the father of Garmadon and Wu; father-in-law of Misako and the late Sunako; grandfather of Lloyd, Lucas, and Wallace; grandfather-in-law of Joanna and Chyenne; great-grandfather of Logan, Chaina, Axis, Jade, Max, Alex, and Janet; great-grandfather-in-law of Lazuli, Malcolm, and Grace; and great-great-grandfather of Erica, Lea, Carrie, Elijah, Jenna, Aaron, Natalie, Star, Loli, Khione, and Calais. Zhekoro is the creator of Ninjago and is basically Ninjago's version of God (except Zhekoro is a physical being and God is theoretical).

Contrary to popular belief, Zhekoro is actually just a human and not some otherworldly creature. When his home realm, Earth, was destroyed, he was stuck in limbo along with Earth's other inhabitants. 13,000 years later, he and his wife, Maria, were brought out of limbo by uncertain means and placed in the desolated former Earth. He was given the power to recreate the world how he saw fit, and he decided to create four golden weapons. Using the power of the weapons, he created Ninjago from the Earth's ruins and tried bringing people out of limbo.

Trivia

 * People say Wu looks just like his father, but that's not entirely true.
 * Zhekoro had his hair in a braid and his beard was slightly shorter.
 * Zhekoro is also shorter than Wu and has a different nose.
 * Garmadon inherited his father's nose instead of his mother's, while Wu was the other way around.
 * They have different eye colors.
 * Zhekoro was a twin, like Lloyd and Lucas. Twins seem to run in the family.
 * It's inferred that Zhekoro was the younger twin rather than the older one, because it's well known that the younger brother is more likely to have more facial hair than the older brother.
 * This is seen multiple times:
 * Lucas has a goatee while Lloyd has no facial hair
 * Wu has a long beard and mustache while Garmadon has neither
 * In concept art of Jay's older brother Neville, he is always shown without facial hair while Older Jay is
 * Zane had a beard at one point while neither of his older brothers had facial hair
 * In real life, Property Brothers' Drew Scott has facial hair while his older twin Jonathan doesn't