Itachi and Shisui.

Shisui Uchiha's appearance: Similar to his ancestor Kagami Uchiha: short, tousled dark hair, a fairly wide nose and prominent eyelashes sticking up. He wore the standard Uchiha clan clothing: a dark shirt with a high collar and dark pants. He wore a leather mount for a small blade (tanto) over his shoulder. The head was decorated with a protector, on which the Konoha emblem was placed. Character of Shisui Uchiha: Modest and realistic. Shisui was not proud of his talent and achievements, but when others made mistakes, he was willing to point them out. He had no prejudices, so he stubbornly did not cling to any one ideal and sought to see the unique nature of the current state of affairs. Perceptive and intuitive, Shisui was able to see through the emotions of others and thus notice the smallest details. Loyal to the Uchiha clan, Shisui was very loyal to the clan, which is why the Konoha Military Police Force assigned him to spy on Itachi. He values the concept of "family" highly. Shisui vowed not to let clan ambitions ruin Itachi and Sasuke's relationship. He has a good sense of humor. This can be seen in how he finds it funny when Itachi is in a difficult situation when he is arguing with Sasuke about who is stronger, Itachi or Shisui.

Itachi Uchiha's appearance: Itachi appears to be a man of average build. Like all members of the Uchiha clan, Itachi has dark eyes. Long dark brown hair reaches the middle of her cheeks in the front and is pulled back into a ponytail with a red elastic band in the back. Dark stripes extend from the eyebrows to the cheeks under the eyes, which is extremely unusual. According to Naruto, Itachi is very similar to Sasuke, but looks more ferocious.Itachi Uchiha's personality: Perceived by all as a cold-blooded and heartless killer with maniacal tendencies due to the murder of his own clan, however, in reality, Itachi is a balanced, empathetic and noble man, capable of sacrificing his own life and honor for the happiness and well-being of others. Itachi has a generally calm personality, is respectful of others, and is always able to appreciate others' achievements, even if they are rather insignificant. He knows how to control himself, although he is sometimes noticeably surprised if someone significantly exceeds his expectations. Has a tendency to have deep thoughts about life, duty, human nature, shinobi, society, and war. Incredibly smart and talented as a strategist, he has a good understanding of people. He is excellent at hiding his emotions and lying, and has an iron will and self-control. Knows how to admit his mistakes and ask for forgiveness.