|“||Ian and Natalie Kabra were standing by Grace's coffin, looking like perfect little angels as they talked to the preacher. They wore matching designer mourning outfits that complemented their silky black hair and cinnamon-colored skin. They could've been child supermodels.||”|
— Describing Ian and Natalie at Grace's funeral
Vikram and Isabel Kabra were the leaders of the Lucian Branch. Ian and Natalie Kabra formed one of the teams in the hunt for the 39 Clues, and were, perhaps, Amy and Dan's most formidable and crafty opponents. Ian and Natalie were supposed to eliminate Amy and Dan, but Natalie started to become soft and Ian began to grow feelings for Amy. The Kabra children ended up as one of the kinder teams. After Into the Gauntlet, Isabel Kabra was arrested for the murder of Hope Cahill and Arthur Trent and attempted murder in the Madrigal Stronghold, while Vikram fled to Brazil.
- Vikram Kabra - (Father) In Hiding
- Isabel Kabra - (Mother) (aka Vesper 2) Deceased
- Ian Kabra - (Son - disowned by mother)
- Natalie Kabra - (Daughter - disowned by mother) Deceased
Ian and Natalie Kabra had many alliances with other teams during the Clue Hunt. They always ended up double-crossing their alliances. They would strand them in the middle of nowhere, and once, killed one. Their first alliance was Irina Spasky. Following alliances included Amy and Dan, and Alistair Oh.
Vikram and Isabel Kabra were the Lucian Branch leaders, but since Isabel was arrested and Vikram fled. It is shown in the The Black Book of Buried Secrets that Vikram had fled to Brazil because of Isabel's arrest.