|Debut||"Reins of a Waterfall"|
|Family|| Sam Adama, husband|
Joseph Adama, brother-in-law
Shannon Adama, sister-in-law
William Adama, nephew
Tamara Adama, niece
Young Bill Adama, nephew
William Adama Sr., father-in-law
Isabelle Adama, mother-in-law
Larry is Sam Adama's husband. His last name is unknown. His marriage with Sam is a happy one and very stable.
Larry teaches his nephew, William Adama (Willie), about the four gods most important to his father's home - Order (Jupiter), Nature, Strength (Mars) and Love. Mars is the most important God in their home because of Sam's Tauron heritage. Larry tells Willie that the Mars idol at their home is three times the size of the others because he married a "tough guy". ("Reins of a Waterfall")
He and Sam are devoted uncles to their nephew. Willie asks them why they do not have children, and why they do not adopt an orphan like his father and Sam were. Sam says it is because of the dangerous nature of his job as Ha'la'tha enforcer. ("Reins of a Waterfall")
Sam washes up at his brother's home after coming back from a job because Larry does not like him to come home bloody. ("Gravedancing")
Larry joins Sam at Joseph's home in support when Sam goes to convince his brother to have the funeral rites for Shannon and Tamara. Sam says Willie needs the closure and reconnection with Tauron ways. At the funeral, Larry and Willie learn a Tauron clapping game/ritual from Sam and other family members. ("There is Another Sky")
He is not a native Tauron like Sam so he does not understand Sam's obsession with the civil unrest on Tauron. ("False Labor")
He mourns with the family and comforts his husband in the aftermath of Willie's murder. Five years later, on the fifth anniversary of Willie's death, Joseph explains to his and Evelyn's son, Bill, that he was named for his deceased half-brother per Tauron custom. With a "So Say We All," the family celebrates Bill continuing the family tradition. ("Apotheosis")
- In the world of the Twelve Colonies, homosexuality is not an issue. The Caprica mythos is primarily based on Ancient Greek civilization in which homosexuality was accepted as normal. Therefore, Larry's sexuality is never questioned or stigmatized. It is a normal part of the fabric of society.
- Although not mentioned in the dialogue, Diana (or Ceres) and Venus are implied when Larry speaks of Nature and Love.