Shohei Kazama
Shohei is a 15 year old boy who works at a struggling flower shop part-time. One day, after a solar eclipse/literal meteor shower (the shards of an asteroid raining down after it burns up in the atmosphere), he buys a strange plant he names Hikari II to not only save the shop, but to win the heart of his crush that the plant was named after, Hikari Momokawa. But Shohei soon discovers that the plant, Hikari II, feeds on his Life Energy, which often leaves him tired.
- Beware the Nice Ones: If there's one thing he hates more than being called short, it's if someone were to mess with, threaten, endanger, or hurt Hikari.
- Ditzy Genius: Shohei knows a lot about plants, outer space, etc., but he doesn't seem to know much about Venus flytraps.
- Heroic Sacrifice: In the final chapter, he begs a fully grown Hikari II to eat his soul instead of Hikari's.
Hikari Momokawa
Hikari is the rich girl that Shohei has a crush on. 2 days before the story began, her dad dies in a yacht accident, which also takes a toll on her family's wealth. But when the asteroid came to Earth, it breaks into many fragments, and Hikari manages to get a shard to sell for a really high price.
- Beware the Nice Ones: Don't mess with Shohei. This is demonstrated when Sango threatens him. She ends up getting flipped by Hikari, who Took a Level in Badass by taking self-defense lessons.
- Disappeared Dad: Her father died 3 days before Hikari II came to Tokyo.
Minami Kazama
Shohei's loving mother.
- G-Rated Drug: She has an unusual addiction to tea.
Kazuki Kazama
Shohei's father. He's often busy travelling on business to support his family.
- Strong Family Resemblance: He is where Shohei got his looks, right down to the coke-bottle glasses.
Inumaru
Shohei's dog.
- Dog Walks You: Big ol' Inumaru is strong enough to drag li'l Shohei as the latter holds on to the leash.
Natsumi
Hikari's best friend.
The Sharks
A ruthless motorcycle gang led by Orin Samekiba that cause trouble for everyone in Tokyo, especially Shohei.
- '80s Hair: Piranha sports a black mullet.
- Anime Hair: Orin's hair resembles a shark fin.
- Meaningful Name: Unagi means "eel", and he is the lankiest of the gang.
- Theme Naming: Piranha, Unagi (eel), and Sango (coral) are obvious, and Orin's last name translates to "shark fang/shark tooth".
The Strange Trio of Women
They are discreet characters that seem to be helping Shohei out.
- Color-Coded Characters: Ronette is red, Crystal is blue, and Chiffon is yellow.
- Freudian Trio: Ronette is the leader of the trio who is sometimes short-tempered (Ego). Crystal is calm and rational (Superego). Chiffon is heerful and ditzy (Id).
