Yuki Kaida (甲斐田 ゆき, Kaida Yuki^?, born November 30, 1974) is a voice actress and radio personality from Tokyo, Japan. Although she has an extensive vocal range, voicing a large variety of characters throughout her career, she is commonly typecasted as young males, achieving mainstream success as her roles in Hunter × Hunter as Kurapika,The Prince of Tennis as Shusuke Fuji,Shōnen Onmyōji as Abe no Masahiro. and Hetalia Axis Powers and Hetalia World Series as China or Yao Wang. She was formerly affiliated with the talent management agency Toritori Office, but is currently freelance.

She holds the distinction of being one of the only Japanese voice actors to have completed their formal education in the United States. Consequently, she speaks multiple languages with varying degrees of fluency outside of Japanese. She is affectionately nicknamed Yukki (ゆっきー^?) by her Japanese fans.

Junko Minagawa (皆川 純子, Minagawa Junko^?, born November 22, 1975 in Tsuchiura, Ibaraki) is a Japanese voice actress affiliated with Haikyo. She is well known for voicing young boys, although she has done "feminine" lady roles, as well as flirtatious women. She has also sang some of the openings and endings of the anime Prince of Tennis as well as vocal tracks and singles for this series.

Yuki Kajiura (梶浦 由記, Kajiura Yuki^?, born August 6, 1965 in Tokyo, Japan) is a Japanese composer and music producer. She has provided the music for several popular anime series, such as one of the Kimagure Orange Road movies, Noir, .hack//Sign, Aquarian Age, Madlax, My-HiME, My-Otome, .hack//Roots, Pandora Hearts, Puella Magi Madoka Magica, Tsubasa Chronicle and the Kara no Kyoukai movies (amongst others). She also assisted Toshihiko Sahashi with Mobile Suit Gundam SEED and Mobile Suit Gundam SEED Destiny. Kajiura has also composed for video games, including the cutscene music for Xenosaga II and the entire Xenosaga III game soundtrack.

Due to her father's work, Kajiura lived in West Germany from 1972 until her middle school years. Her first music piece, which she had written at the age of 7, was a farewell song for her grandmother. After graduating from college (back in Tokyo), she began working as a systems engineering programmer, but in 1992, she turned her career around to focus on her activities on music. She admits that it was her father who greatly influenced this decision, for he was a great opera and classical music admirer.

Troy Aumua Polamalu ( /ˌpoʊləˈmɑːluː/; born April 19, 1981), born Troy Aumua, is an American football strong safety for the Pittsburgh Steelers of the National Football League (NFL). He was drafted in the first round (sixteenth overall) of the 2003 NFL Draft by the Steelers. He played college football for the University of Southern California.

Polamalu was born in Garden Grove, California. He graduated from Douglas High School in Winston, Oregon. Though playing in only four games (injuries) during his senior season, he was named to the 1998 Super Prep All-Northwest team, Tacoma News Tribune Western 100, and the All-Far West League second team. A two-way player, Polamalu rushed for 671 yards with nine touchdowns and grabbed three interceptions.

Following his junior season, Polamalu was named to the All-State first team and was the All-Far West League Offensive Most Valuable Player for 9-1 Douglas. He rushed for 1,040 yards with 22 touchdowns and had 310 receiving yards. On defense, he made 65 tackles and had eight interceptions.