Characters and Age
Serena 24
Rini 21
Rei 17
Duo 19
Quatre 22
Heero 20
Wu Fei 17
Milliardo (Zechs) 21
Treize 21
Trowa 18
Lady Une 34
Lieutenant Noin 36
Haruka 25
Mitchiru 25
Setsuna 34
Ataru 14
Zoisite 19
Malachite (Kunzite) 20
Nephrite 18
Jadeite 14
Darien 38
Helios 15
Relationships
Quatre and Serena begin married
Rei and Heero Meet after first battle
Rini and Zechs (Milliardo) meet through Rini's brother
Mitchiru and Helios Best Friends
Darien and Setsuna known from childhood, have been betrothed, and married.
Families
Heero, Duo, and Serena \Yuy
Treize and Rini \Kushrenada
Rei and Wu Fei \Chang
Zoisite, Malachite, Nephrite, and Jadeite \Barrol
Darien and Helios \Ellusion