たる (taru): As a; worthy of being
～たる (taru)
Meaning
As a; worthy of being
Formation and usage
N + たる（者）
Notation: N = noun; V dictionary = dictionary-form verb; V stem = the stem before ます; plain clause = plain-form clause; negative stem = the form before ない. Follow the attachment shown above.
Explanation
A formal expression stressing the duties or qualities expected of a role.
Examples
教師たる者、責任ある行動を取るべきだ。
A person who is a teacher should act responsibly.
医師たる者、責任ある行動を取るべきだ。
A person who is a doctor should act responsibly.
指導者たる者、責任ある行動を取るべきだ。
A person who is a leader should act responsibly.
経営者たる者、責任ある行動を取るべきだ。
A person who is a manager should act responsibly.
政治家たる者、責任ある行動を取るべきだ。
A person who is a politician should act responsibly.
How related patterns differ
たる invokes a role's qualities; たらんとする aspires to it. まじき and ともあろう者が condemn unworthy conduct. べからず prohibits, while てしかるべきだ states what is proper. These forms can be strong or old-fashioned, so register matters.