Di Nozzo's mother was over-protective and she "dressed him like a sailor until he was ten".
("Frame Up") Di Nozzo is a flirt, and has a fondness for playing pranks on his co-workers, sometimes with little respect for their boundaries.
However, Todd's relationship with Di Nozzo is more adversarial and they are more like siblings than anything else.
Tony frequently flirts with her and sometimes goes through her personal belongings, no matter how many times she points out that his behavior is grossly unprofessional.
She works well with everyone on the team, becoming particularly close with Ducky and Abby, who convinces her to get a tattoo.
In the episode "Blowback", when confronting "Goliath" on the plane about "ARES", Gibbs reveals he is a Virgo.
He is an expert sniper, as evidenced in "Hiatus" with flashbacks of him hitting at 1200 yards a long-distance head shot of his family's murderer, who was driving a moving vehicle, and in "Jeopardy" when he hits a kidnapper with a very swift shot to the forehead taken with his left hand while kneeling inside a car trunk.
At the same time, Kate is willing to risk her life for Di Nozzo and admits that life would be considerably less interesting without him around. (Michael Weatherly) is a former homicide detective for the Baltimore, Philadelphia and Peoria Police Departments.
Following Sasha Alexander's decision to leave the show, Todd is killed in the line of duty (at the end of the episode "Twilight") by Ari Haswari, collateral damage in the terrorist's obsession with Gibbs. Like Gibbs, he has limited patience for the scientific method and technical terms.