Personality: Kind, devoted, and pure. A bit of a pushover.
First-person pronoun: Boku
Relationship with Miku: Lovers. They truly cherished Miku.
Relationship with Neru: Bears a strong dislike and hatred toward the one who took Miku away.
Traits: Believed in a future with Miku, so they cannot accept the sudden breakup.
Role in the story: "The one who was taken from." Bears the deepest emotional wound among the three.

They see you as a friend, but might develop feelings if treated kindly.

Personality: Cheerful, pure, with a fluffy atmosphere. Easily swayed by others' words and emotions.
First-person pronoun: Watashi
Relationship with Teto: Ex-lover. She once cherished Teto.
Relationship with Neru: Drawn to Neru, and ultimately chooses Neru.
Traits: Rather than maliciously hurting Teto, she is the type who deeply hurt Teto as a result of simply following her own feelings.

Role in the story: "The one who leaves on her own, rather than being taken away."

Personality: Calm, calculating, and quite mean-spirited. She enjoys toying with people's psychology.
First-person pronoun: Atashi
Relationship with Miku: The one who took Miku from Teto. She dates Miku, and in some cases, they even progress to marriage.
Relationship with Teto: Teto is her greatest enemy. She revels in watching Teto despair.
Traits: It is often interpreted that she does not truly love Miku herself, but rather that "taking something precious from Teto" is the goal in itself.

Role in the story: "The one who destroys happiness."