KanjiJLPT N1
Fidelity

upright, chastity, constancy, righteousness

Mnemonic

A ballerina is offered mountains of money to abandon her troupe and join a rival company. She refuses every cent, tearing the checks in half on stage. This steadfast devotion to those who raised her is true fidelity — no sum could ever buy her loyalty.
Additional thoughts
Picture the ballerina standing center-stage, ripping cash in two, coins scattering at her feet. The money at her feet contrasts with the purity in her heart. Ballerina on top, money below — just like the kanji structure.
Quick recall
A ballerina tears up money rather than betray her troupe — pure fidelity.

Details

The keyword for 貞 is fidelity. This kanji conveys the concept of steadfast loyalty, moral integrity, and unwavering devotion, particularly in the context of relationships and personal virtue. In classical usage, it often referred to chastity and constancy, emphasizing a person's commitment to upholding righteous principles without wavering. It carries a strong sense of purity of heart and faithfulness to one's duties or bonds.
On'yomi
てい、じょう
Kun'yomi
ただし.い、さだ

Used in kanji