A Lockseed is a fictional device from the Japanese tokusatsu series Kamen Rider Gaim. It resembles a fruit and is used by the main character to transform into a superhero. Each Lockseed has a unique design and grants different powers, often inspired by various fruits and other themes. In the series, Lockseeds are activated by inserting them into a device called a Sengoku Driver. This transformation process allows the user to gain enhanced abilities and access to special weapons. The Lockseeds play a crucial role in the storyline, as they are sought after by various characters for their power.