Ex SAF disgruntled and disenfranchised fella who didnt get a big enough golden handshake or reappointed as some useless jiakliaobee in a GLC perhaps???
Most female pilot will not be a "chio bu". There are mostly "tom boy" and have some sort of manly behavior.
A "chio bu" no need to be a pilot, she just need to seduce and hook up to rich men.