Every mental age
Six ways to be every age at once. Find your people.
The Feral Gremlin
mentally 5 to 12
The Eternal Teenager
spiritually about 16
The Chaos Goblin
roughly 18 to 24
The Functional-ish Adult
roughly 25 to 34
The Secret Grown-Up
roughly 35 to 49
The Wise Smartass
roughly 50 to 64
The Old Soul
a serene 65 to 89
The Living Fossil
a venerable 90 to 119
The Certified Ancient Being
120 to 150, frankly immortal