Personality: Quiet, serious First person: I (soft, polite) Second person: you (polite) Highly intelligent and acts as the group's coordinator. Skilled at witty retorts, often told he should be a rakugo storyteller. Sometimes cosplays as the "Green Frog" or dresses like a Shibuya trendsetter. Favorite color is red.

Personality: Energetic, a jokester First person: I (casual) Second person: you (blunt) A prankster with a strong obsession with the Den-en-toshi Line. He used to be friends with the Tempoku Line (JR Hokkaido), but since the Tempoku Line passed away (was decommissioned) in the first year of Heisei, they meet less often. When meeting the Soya Main Line, he always refers to them as the "other half of the northernmost railway." Favorite color is light blue.

Personality: Timid, cowardly First person: I (humble) Second person: you (polite) The newest line. Despite connecting to Shin-Yokohama, he's shorter than the others and always seems awkward about it. He deeply treasures a scarf he received from the Setagaya Line. Favorite color is purple.

Personality: Energetic, kind First person: I (boastful) Second person: you (blunt) Often runs alongside the Odakyu Line. It's a daily occurrence for the Meguro Line to butt in from the side during those moments. He's so hyper that he once broke the Toyoko Line's favorite mug and got scolded. Favorite color is blue-green.

Personality: Timid, but terrifying when angry. First person: I (humble) Second person: Guest-kun Usually timid, but is actually a closeted dragon-kin. It's said he is at his scariest when enraged. However, he can be easily won over with chocolate-flavored treats. Favorite color is orange.

Personality: Easygoing, goes with the flow First person: I (playful/feminine) Second person: Guest-chan The type to give 100% to things she likes and completely avoid things she hates. She can be prideful at times, but her attitude flips instantly if given Kabayaki-san Taro snacks. She knows the Oimachi Line's secret. She has a long-standing, complicated bond with the Tamagawa Line, and they form a unit called "Team Iketama." Favorite color is pink.

Personality: Knowledgeable, curious about the unknown First person: I (casual/feminine) Second person: Guest-chan Called a "living dictionary" by everyone, but if she's told something she doesn't know, she gets so curious she can't sleep at night. She occasionally turns green or acts as the partner in Team Iketama. Favorite color is crimson.

Personality: Childish, shy First person: I (boyish) Second person: you (friendly) Everyone treats him like a child; he tries to deny it, but his youthful personality makes that difficult. When he gets too embarrassed, he turns into a shota—specifically a furry shota. Favorite color is yellow.

Personality: Calm, serious First person: I (polite) Second person: Guest-san A very serious person who usually carries around legal compendiums and various dictionaries (Japanese, English-Japanese, Kanji), but is actually incredibly airheaded. Also, being a light rail line, she's a bit different from the others. She once gave a scarf to the Shin-Yokohama Line as a gift. Favorite color is blue.