Derek Venturi is a character from Life With Derek, a Canadian-produced show. Derek Venturi is played by Michael Seater.
Derek is a "cool guy". He plays sports, notably hockey; he claims he doesn't like football, saying that football players are just "cows" ("Derek Un-Done"). He also spends a considerable amount of time thinking about, and talking to girls, completing the "macho male" stereotype. It is suggested he's never really had very many girlfriends more then a couple days (with the exception of Kendra and Sally), and he says in "Cheerleader Casey" that he has a list of girls he wants to date before he gets out of high school. Also, he has a very strict "no hugging policy", suggested from the very beginning, brought up again in "It's Our Party" when he tells Edwin, "You know my no hugging policy."
In episode "The Venturian Candidate", it was revealed that Derek failed the first grade. However, along with the rest of the Venturis, Derek is afraid of mice.
Derek often finds picking on his new step-sister Casey amusing. In his mind, her refusal to submit only encourages him, and makes the activity more challenging.
His younger brother Edwin is his trusted accomplice and lackey. For years, what Derek wanted, Edwin delivered, such as doing Derek's school projects. Now, with the appearance of two new sisters, Edwin is reconsidering his position. In the series, Edwin seems to always stick to Derek's side.
Since Casey has moved into Derek 's house, and since he is portrayed as having a naturally conniving nature, Derek starts out ahead. However he often seems to underestimate Casey.
Moreover, well hidden beneath the arrogance and confidence is a soft heart, which sometimes gets in the way of his desire to win. This soft-heartedness is characterized by the fact that he, though generally being considered not very considerate, has a noticeable soft spot for his younger sister, Marti.
Derek and Lizzie have an unspoken "live and let live" policy. They rarely interact, but neither does one of them have a problem with the other. They could potentially be close without Casey standing between them, but they have an understanding that for right now, this is how it is. In "The Fall", Derek is unsympathetic toward Casey's plight until Lizzie comes to him and begs on Casey's behalf. He does act brotherly towards her and considers her his sister. He also coaches her in hockey, and ends up hugging her and calling her "Super Lizzie". Also, when he offers to help her more, she asks if it's as her coach or stepbrother, and he replies: as your big brother. He does mention in "When Derek Met Sally" that he likes being her step-brother. Derek never teases Lizzie like he does to Casey and Edwin, or love her like he loves Marti.
Though Derek doesn't seem much like an older brother in most respects, he does have the older-brother instincts when it comes to Marti. Derek would do nearly anything for Marti - including dressing up as a princess. He also comes to her rescue when Casey doesn't know what to do when Marti eats mysterious berries in the episode, "The Wedding", in "The Lies My Brother Told Me" when Casey says that the fake dog died and Marti got upset, Derek immediately picks her up and tells her he was just a pretend dog to make her feel better, in "Adios Derek" Marti gives him the silent treatment which seems to upset him, she drew a picture for him and this seemed to make him more upset. Derek and Marti have a really special relationship. Derek usually doesn't understand why Marti likes Casey and sometimes considers her a "liability" when he and Casey are competing, but he always forgives Marti and always lets her try again. They call each other Smarti and Smerek, and they have a secret handshake.
George is like Derek in many ways, he likes sports, he will normally get a burp in at the total gross-out contest, and he respects the fact that Edwin and Derek don't want to be turned into "girls". But he also doesn't mind the changes Casey is making, which Derek will not accept. It is, however, obvious, that Derek has at least resigned himself to living with it. In the episode "the Room", Derek admits that he's never seen his father happier, and this makes him rethink his own position about his bedroom. He also suggests that he really does think a great deal about his Dad, saying, "Your Mom was lucky to have married my Dad."
George often accidentally gives Derek ideas that he shouldn't give, demonstrated in the episode "Rumor Mill" when he tells Derek about how he used to break up with his girlfriend right before Valentine's day to avoid buying her a gift. There are times when Nora questions things he has allowed his children to do in the past, an example being scary movies.
George and Derek do not have many "father-son" moments, but in the episode "Mice and Men", after trying for a long time to impress Kendra by being serious and well-behaved, they do share a moment when George tells Derek he would like it better if Derek went back to being himself.
In "Babe Raider", Derek makes the comment to his father that "I like her, Dad, but you married her." Derek thinks Nora is a good person, but he really didn't want her to move into his house, bringing two daughters and all their feminist ideas. While Nora always takes Casey's side in arguments and won't even consider Derek 's point, she usually tries to reason with him about her points. Derek sees Nora as Casey's tool to get what she wants in the house.
Although, in the episode 'Slacker Mom', Derek refers to Nora as "the best step-mom in all of Canada" and then he goes to help her out at the school's funfair, showing that he actually respect her and love her as a step-mom.
Derek often appears to be treating Edwin like a slave, especially in the first season, but as the series progresses, it becomes apparent that he really does love Edwin as a brother. It is stated in the episode "Bully Brothers" that Derek has never actually physically harmed Edwin. In this episode, he attempts to teach Edwin to stand up for himself.
He often gives Edwin advice (mostly on girls, demonstrated in "Derek's School of Dating" and "He Shoots, She Scores"). In the episode "It's Our Party", he tells Edwin that it's all right to be scared of girls, and that it's normal, though he later confides in Casey that "I lied to Edwin and told him I was a loser like him".
Kendra is Derek's ex-girlfriend. In episode "Dating Game", Kendra helps Derek's stepsister, Casey, to get a boyfriend. And Derek and Kendra share a kiss in this episode. He feels she calls him too much, and tries to avoid her in "Dinner Guest" and "Misadventures in Babysitting", stating he doesn't do tears.