Final answer:
Zeus is the Greek god who accuses Percy of stealing his lightning bolt. Zeus is the ruler of the sky and wields a lightning bolt as his weapon, both in classic Greek mythology and modern narratives like 'Percy Jackson & the Olympians'.
Step-by-step explanation:
The Greek god who accuses Percy of stealing his lightning bolt is Zeus, the king of the gods. In Greek mythology, Zeus is depicted as the ruler of the sky and is often associated with the iconic lightning bolt as his weapon. The story of Percy being accused of stealing Zeus's lightning bolt is a blend of modern literature and ancient mythology, found in the contemporary novel 'Percy Jackson & the Olympians' by Rick Riordan. The novel reimagines the pantheon of Greek gods and their interactions in a modern-day setting. In mythological texts, Zeus's authority among the Olympian gods is uncontested, and he has been involved in numerous disputes in both classical myths and contemporary renditions of those tales. In the Percy Jackson series, this accusation kicks off a series of adventures for the titular character, emphasizing themes of heroism, friendship, and the longstanding influence of Greek mythology in literature.