Boone Carlyle

Shannon's step-brother
Son of Sabrina Carlyle
Stepson of Adam Rutherford
Deceased, died due to complications from injuries sustained when the Beechcraft fell from the trees

BEFORE THE CRASH

Was the COO (Chief Operating Officer) of his mother's business called Carlyle Weddings
Was a lifeguard at one point
Was in love with Shannon (his step-sister)
Saw Sawyer in a police station in Australia
Had a one-night stand with Shannon not long before getting on the flight
Had a Business Class seat of 9E on the plane.

Applies CPR incorrectly to Rose, blowing air into her stomach, before Jack stops him.
Tries to help Jack revive Rose by getting pens to perform tracheotomy with
Learned to let go of Shannon after being drugged by Locke and hallucinating
Worked with Locke to break into the Hatch
Was with Locke when they found Claire.
Climbed into the Beechcraft at the request of Locke who was too incapacitated to do it himself
Discovers that the Beechcraft is really a Nigerian Drug Runner Plane, as inside the plane are a number of Virgin Mary statuettes all filled with Heroin
Made contact with Bernard using the radio found in the Beechcraft
Sustains eventually fatal injuries when the Beechcraft falls from the trees while he's inside
Is carried by Locke all the way back to the caves
Dies while under Jack's care after telling Jack to let him go
The chinese figure on Boone's singlet means the number 84, which is a reference to Yin & Yang - a central symbol in taoism.