K-pop Boy Groups

RK3 Members Profile: Full Names, Ages, Heights, Weights and More

June 24, 2026 | By Kris Lodhi

RK3 members are Lin, Kai, and Castiel.

Origin	Seoul, South Korea
Debut	N/A
Number of Members	3
Members	Lin Kai Castiel

RK3 Members Profile

Lin

RK3 member Lin

Full Name	N/A
Birthday	N/A
Birthplace	N/A
Age	N/A
Height	N/A
Weight	N/A
Zodiac Sign	N/A
Blood Type	N/A
MBTI	N/A
Position	Leader, Lead Vocalist

Kai

RK3 member Kai

Full Name	N/A
Birthday	N/A
Birthplace	N/A
Age	N/A
Height	N/A
Weight	N/A
Zodiac Sign	N/A
Blood Type	N/A
MBTI	N/A
Position	Main Rapper

Castiel

RK3 member Castiel

Full Name	Hyunjun
Birthday	December 7, N/A
Birthplace	N/A
Age	N/A
Height	6 feet 1 inches (185 cm)
Weight	N/A
Zodiac Sign	Sagittarius
Blood Type	N/A
MBTI	N/A
Position	Visual, Main Dancer, Maknae

FAQs

How many members are in RK3?

RK3 is a 3-member K-pop boy group. The group consists of Lin, Kai, and Castiel.