Each clip plays candidates A, B, C, D in order with a short gap.
A bright and bubbly · B a touch softer · C energetic (close to Ren) · D like A, a bit more mature
A darkest and creepiest · B her current voice, slightly lower · C cool and elegant · D warm and breathy
A smooth and low · B deepest and most gravelly · C husky · D the current stand-in