All About Onew !

Onew(온유) (The Leader)
→ Onew (Onyu in hangul) is the leader of the group. He is often seen smiling during interviews and guestings, and even behind the scenes. He often tries to crack jokes but seems to fail, thus leading to getting teased by Jonghyun and Key. He seems to be closest to Jonghyun due to their almost in existent age gap.

Stage name: Onew (온유 or 温流)
Birth name: Lee Jinki (이진기)
Nickname: Sundubu, one - because of his love for soft tofu, and two - because 'he could sit in a corner and remain unnoticed'. That's what he said in the Reality Show, at least.
Birth date: December 14, 1989 (1989-12-14) (age 20)
Position: Sub vocal, Leader
Height: 177 cm
Interest/Specialty: Singing, Playing the piano, Mandarin

→ He was recently featured in Lee Hyunji's mini album in the song Vanilla Love.
→ Jonghyun and Key mentioned something about Onyu keeping a still and serious atmosphere whenever they're in the car. They dubbed it as the Onew Condition. They teased him about it in the fifth episode of the Reality Show.
→ He has an absolutely dorky dance.