Duncan Kane, furious that his sister's murderer had gotten away with the crime, arranges for Aaron to be murdered by Clarence Wiedman (the head of security for Kane Software) in his hotel room.During his freshman year at Hearst College, Logan learns that he has an older half-brother; his father's illegitimate child from an affair with a flight attendant.Aaron Echolls (father, deceased)Lynn Echolls (mother, deceased)Trina Echolls (adoptive half-sister)Charlie Stone (half-brother) Veronica Mars (girlfriend)Lilly Kane (ex-girlfriend,deceased)Hannah Griffith (ex-girlfriend)Parker Lee (ex-girlfriend)Carrie Bishop (ex-girlfriend,deceased) Logan Echolls is Veronica's on-again, off-again boyfriend, and Duncan Kane's best friend.
Logan discovers his half-brother when he gets help from Veronica to investigate the disappearance of trust money left to him after Aaron's death.
Aaron's relationship with Charlie is only through an agreement of payment that was set up through a children’s foundation — which is used as a front to keep Charlie's identity a secret from the public.
Nonetheless, Logan's feelings toward his father are made ambiguous by the inherent parent-child bond, Logan's unusually deep capacity for love and loyalty, and Aaron's own complex character, which includes intermittent (and generally self-serving) attempts to support his children, and some degree of parental protectiveness (as seen, for instance, when he beats up one of Trina's abusive boyfriends).
Logan receives little comfort from his mother, who turns to pills to distract herself from her husband's adultery and violence.
But as time passed, Veronica discovered that Logan was much more than that.
The abused son of superstar movie actor Aaron Echolls, Logan was the on-again, off-again boyfriend of the deceased Lilly Kane and close friends with Veronica Mars and her then-boyfriend Duncan Kane.The two were portrayed as being close, although even Veronica did not know about Logan's abuse at the hands of his father.The seeds for the inevitable falling out between the two friends began when Veronica caught Logan kissing a new transfer student (the daughter of a famous rap music producer) and told Lilly about it.When his mother commits suicide during his junior year, Veronica assists him in confirming her death, and they later begin dating.Described as Neptune High's "obligatory psychotic jackass" by Veronica (Pilot), Logan was originally one of the school's main bullies and a nemesis for Veronica.He was dating Duncan's sister and Veronica's best friend, Lilly Kane, on and off for two years until she was murdered during their sophomore year, and he later finds out that the killer was his A-list actor father, Aaron Echolls.