Lucius Barbara is a lion under the care of Rhea.
The Senior Year Adventures[]
The Chalice of the Gods[]
During a brunch held for Rhea on Olympus, she takes Lucius with her. During Zeus's speech, he comes face to face with Percy Jackson as the demigod tries to give Ganymede his chalice back.
| The Senior Year Adventures | |
| Books: | The Chalice of the Gods | Wrath of the Triple Goddess |
| Main Characters: | Percy Jackson | Annabeth Chase | Grover Underwood |
| Secondary Characters: | Sally Jackson | Paul Blofis | Eudora | Hecuba | Gale | Nope |
| Minor Characters: | Naomi | Barbara | Elevator Security Guard | Blanche | Lucius | Margaret | Sparky | Li'l Killer | Mrs. Foray | Dr. Samuels | Dr. Sharma | Peter Stuyvesant | Mrs. O'Leary | Chiron | Connor Stoll | Clovis | Harley | Valentina Diaz | Juniper |
| Gods: | Ganymede | Iris | Hebe | Elisson | Poseidon | Zeus | Demeter | Hera | Hermes | Athena | Geras |
| Titans: | Rhea | Kronos | Hecate |
| Mythical Creatures: | Nereid | Nymph | Horned Serpent | Hellhound |
| Related Content: | Rick Riordan | Percy Jackson and the Olympians |