転てん向こう者しゃ

noun

convert; person who changes allegiance or belief

Refers to someone who has changed their ideological, political, or religious stance, often with a connotation of switching sides or abandoning a previous position.

• 彼かれはかつての反はん対たい派はから転てん向こう者しゃになった。

  He became a convert from a former opponent.

• その政せい治じ家かは転てん向こう者しゃとして知しられている。

  That politician is known as a turncoat.