The first thing Tamagawa Rilan saw when he first came to this earth was Haruki, who was alone. From then on, Tamagawa Rilan stayed with him in the dark until she later appeared in his life as his cousin.
One day, Haruki almost died fighting a monster that flew to Earth, so he decided to merge with Ultraman Zeta to become an Ultra Hero and fight for justice.
Although the two have different opinions on how to protect the earth, they still work together and keep moving towards their goals.
Purpose: Love grows over time