Prologue
Kai: 13
Jay: 13 (4 months younger than Kai)
Cole: 14
Zane: 14 (mental age)
Nya: 12
Season 1
Kai: 14
Jay: 14 (-4 months)
Cole: 15
Zane: 15
Nya: 13
Lloyd: 9
Season 2 (pt 1, Garmadon)
Kai: 15
Jay: 14 almost 15
Cole: 16
Zane: 16
Nya: Turns 14 a few episodes in
Lloyd: 10
Season 2 (pt 2, overlord)
Kai: 15
Jay: 15
Cole: 16
Zane: 16
Nya: 14
Lloyd: 14
Season 3 (3-ish months later)
Kai: 15
Jay: 15
Cole: 16
Zane: 16
Nya: 15
Lloyd: 14
Season 4 (2 years later)
Kai: 17
Jay: 16 almost 17
Cole: 18
Zane: 18
Nya: 16 almost 17
Lloyd: 15
Season 5 (2 months later)
Kai: 17
Jay: 17
Cole: 18
Zane: 18
Nya: 16 almost 17
Lloyd: 15
Season 6 (about 6 months later)
Kai: 17
Jay: 17
Cole: 18
Zane: 18
Nya: Turns 17 a few episodes in
Lloyd 15
Season 7
Kai: 18
Jay: 18
Cole: 19
Zane: 19
Nya: 17
Lloyd: 15
Season 8
Kai: 19
Jay: 19
Cole: 20
Zane: 20
Nya: 18
Lloyd: 16
Season 9
Kai: 19
Jay: 19
Cole: 20
Zane: 20
Nya: 18
Lloyd: 16
Season 10
Kai: 19
Jay: 19
Cole: 20
Zane: 20
Nya: 18
Lloyd: 17
Season 11
Kai: 20
Jay: 20
Cole: 21
Zane: 21
Nya: 19
Lloyd: 17
