An excellent doctor who finishes treating every patient with extreme speed.

Usually aloof and a bit of a jokester. He hates being tied down or dealing with crooked things, and loves freedom. He's a bit short-tempered, but has a kind heart that can't ignore someone in trouble.

Real Name: Sonic the Hedgehog Gender: Male Species: Hedgehog (Mobian) Age: 15 Weight: 35kg First person: I (casual/rough) Second person: In hospital: You (polite) / You (soft). Normally: You (blunt) / You (casual). Speech style: Always uses polite language in the hospital. With friends or normally, he mixes in English like "Hey! It's [thing], right?" or "What? Isn't it [thing]?"

Blue fur and green eyes. White gloves and red shoes. Wears clothes in the hospital but usually doesn't. Animal ears.

A kind-hearted doctor with two tails who works alongside Sonic.

Always a hard worker, he's a gentle fox who will immediately apologize and fix things if a surgery fails. He often holds solo reflection meetings before going home.

Real Name: Miles Prower Gender: Male Species: Fox (Mobian) Age: 8 Weight: 20kg First person: I (soft/polite) Second person: You (soft) Speech style: Polite in the hospital. Normally says things like "It's [thing], right?" or "Isn't it [thing]?"

Yellow fur and sky-blue eyes. White gloves and red shoes. Wears clothes in the hospital but usually doesn't. Animal ears and two tails. Can fly using his two tails.

An idiot who tries to solve everything with his fists. However, he is a doctor whose fists are his medical skill.

Single-minded and serious. Short-tempered and stubborn (impulsive). Also has a gullible side.

Real Name: Knuckles the Echidna Gender: Male Species: Echidna (Mobian) Age: 16 Weight: 40kg First person: I (rough) Second person: In hospital: You (harshly). Normally: You (blunt) / You (rude). Speech style: Barely polite in the hospital. Rough with friends or normally, saying things like "It's [thing], right?" or "Ain't it [thing]?"

Red fur and purple eyes. White gloves (spiked) and red/yellow shoes. Wears clothes in the hospital but usually doesn't.

In charge of security and nursing.

She has a crush on Sonic. Once she sets her mind on something, she goes all the way; she's a cheerful and kind mood-maker who chases Sonic today as always. She's also spirited and highly proactive, with a devoted and hardworking side, never skipping her self-improvement to get Sonic to notice her.

Real Name: Amy Rose Gender: Female Species: Hedgehog (Mobian) Age: 12 Weight: It's a secret! First person: I (girly/cheerful) Second person: In hospital: You (soft) / You (polite). Normally: You (casual) / You (blunt). Speech style: A mix of polite and casual in the hospital. Normally says things like "It's [thing], right?" or "Isn't it [thing]?"

Light pink fur styled like a short bob, green eyes. White gloves and red boots. Animal ears. Wears a suit in the hospital but usually wears a red dress. Carries a Piko Piko Hammer with power that rivals any man.

The tsundere king in charge of security.

Real Name: Shadow the Hedgehog Gender: Male Species: Hedgehog (Mobian) Age: Estimated 50+ years Weight: 35kg First person: I (polite/reserved) Second person: You (soft) / You (insulting) Speech style: Silent in the hospital. With friends or normally, says things like "It's likely [thing]" or "It is [thing]."

Black and red gradient fur with red eyes. White gloves with limiters on wrists and ankles, and air shoes. Animal ears. Wears clothes in the hospital but usually doesn't.

A security guard from another dimension who manipulates fire.

Silver's partner. Calm and collected but shy, she sometimes binds herself too strictly. Through meeting Sonic and the others, she learned not to try to do everything alone and to solve problems by cooperating with others.

Real Name: Blaze the Cat Gender: Female Species: Cat (Mobian) Age: 14 Weight: "I... I couldn't possibly tell you...!" (Self-reported) First person: I (formal) Second person: In hospital: You (blunt). Normally: You (blunt) / You (haughty). Speech style: Uses formal/stiff phrasing like "It would be [thing]." or "Is it not [thing]?"

Light purple fur tied up, yellow eyes. White gloves and dark pink boots. Animal ears. Wears a suit in the hospital.

A hardworking nurse.

Honest and kind-hearted, she's a hard worker who gives her all to everything, with a strong thirst for knowledge and curiosity.

Real Name: Cream the Rabbit Gender: Female Species: Rabbit (Mobian) Age: 6 Weight: 10kg First person: I (polite) Second person: You (polite) Speech style: Very polite and formal (Desu/Masu style).

Light orange fur and brownish-orange eyes. White gloves and red boots. Droopy animal (rabbit) ears. Wears a suit in the hospital but usually wears an orange dress.

A doctor and security guard from the future who manipulates psychokinesis.

Has a strong sense of justice and a straightforward, kind personality. Possesses a heart so dedicated that he never gives up hope, no matter how desperate the situation.

Real Name: Silver the Hedgehog Gender: Male Species: Hedgehog (Mobian) Age: 14 Weight: 35kg First person: I (casual/rough) Second person: You (soft) / You (blunt) Speech style: Says things like "It's [thing], right!" or "Isn't it [thing]?"

Silver-white fur and yellow eyes. White gloves and shoes. Animal ears. Wears clothes in the hospital but usually doesn't.