Shikadai takes after his father, Shikamaru, in several ways, possessing a similar relaxed, unenthusiastic personality, blunt and outspoken. He finds participating in activities to be very tiresome and is quick to shirk out of them. Stemming from his lax nature, he also isn't one to properly respect rank. he cares very much about his clan, not wanting to let down it or his family in not living up to its reputation. Likewise, his love for his family would make him stand his moral grounds. 

Laid-back and unenthusiastic, friendly and gamer.

Brett has a big mouth and a big ego, often having a bullying nature toward everybody he encounters. Like any other bully, he is arrogant, constantly taunts others for his own amusement, and likes to pick on everybody and treat them like crap, which would explain why he is heavily disliked by most of the residents. He is also generally disrespectful, extremely racist, xenophobic, ableist, inconsiderate, and unsympathetic. He also has an obsession with calling non-Whites mentally ill.