character and conduct; personality and behavior
A somewhat formal noun referring to a person's moral character and outward behavior as a unified concept. Often used in educational, disciplinary, or evaluative contexts.
教師は生徒の性行を評価する責任がある。
Teachers have a responsibility to evaluate students' character and conduct.
彼の性行は模範的だと評判だ。
His character and conduct are reputed to be exemplary.
His character and conduct are very serious and upright.
He reformed his character and conduct while at the juvenile detention center.
The teacher observed the student's character and conduct.