With Ichika being the queen let's find the king. Male character popularity poll : r/ClassroomOfTheElite

Classroom Of The Elite (Official)

Stream Ruler of a Cold Game (Classroom of the Elite OST) by It's Aryan

Kiyotaka Ayanokouji, Saimoe Wiki

Kiyotaka Ayanokōji, Classroom of the Elite

AmiAmi [Character & Hobby Shop] Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e Sleeve (Kiyotaka Ayanokouji & Suzune Horikita / Cherry Blossom) Pack(Released)

Ryuen Attacks Sakayanagi Classroom of the Elite Season 2

Classroom of the elite / king & Queen ( Kiyotaka Ayanokōji & Arisu Sakayanagi )

Reincarnated in Classroom of the elite (OP) - Chapter 16: The King and the Princess - Wattpad

These two most likely Elder Horikita : r/ClassroomOfTheElite

Couple : r/ClassroomOfTheElite