Edited from my first post about their themes.
Rinji Shukei Theme Songs
Headstrong by Trapt.
(Sounds like: Koorey Cooper from SKILLET)
Asia Abernathy-Lovegood Theme Songs
Bring Me to Life by Evanesence.
(SOUNDS LIKE: n/a)
Goldicat/ Kinaineko Theme Songs
Sweet But Pyscho by Ava Max.
(SOUNDS LIKE: Billie Ellish)
Other OCS (Theme Songs)
Will fill out when I have more OCs.
KidzSearch Users' OCs' Theme Songs
Lucas Malfoy: Boy in a Bubble by Alec Benjamin*
Tom Malfoy: Mansion by NF
*Tell me if I got the artist wrong!