One under church censure, but admitted to penance; one undergoing penance.
One under the direction of a confessor.
One who repents of sin; one sorrowful on account of their transgressions.
Feeling pain or sorrow on account of one's sins or offenses; feeling sincere guilt.
Doing penance.
Not apologetic for having said or done something that causes actual or potential harm, especially when being apologetic would be appropriate.