Jiren embodies the code of bushido, as canonically stated here. This ancient code is roughly analogous to the European concept of chivalry, which is woven into Chadren's characterization via his will to spread justice and refusal to sow seeds of discord and hurt, even at the cost of his own universe. This can be taken a step further by a knowledgeable scholar (like me and most other Jirenscholars) interpreting "chivalry" as something of a myth, as "chivalrous" knights were often very selfish and acted only for their own gain. Again this is reflected in FLAWEDren's rather selfish worldview which dismisses interpersonal relationships and friendships as weak, needless, and easily fragmented and cast asunder.

TOO, Jiren embodies the wabi-sabi philosophy, which is found in the ancient Japanese art of kintsugi. His flaws, rather than weaken and hold him back, are a part of his history, and add depth of character. Upon realizing these flaws and correcting them, NUANCEDren strengthens his very core, his essence, and transcends them, coming full-circle and completing his character art in a masterfully nuanced fashion that leaves many fascinating possibilities ripe for the future.

"J-Jiren is a boring character..."
Again: I cachinnate.