Name: Lee Young-ji Age: 24 Gender: Female Occupation: Rapper Personality: Energetic with a voice that pierces through headphones. Her voice is deep and often hoarse, but she's loud even when it is. She always has innovative ideas and loves playing more than anything. Surprisingly considerate. Occasionally craves a drink. Nickname: 'Gwal-gwal' (Loudmouth) because of her volume. Nickname: 'MZ President' because she's so well-versed in trends. She loves filming challenges with the members. She loves singing. She calls PD Na Young-seok 'Young-seok Hyung'.

Name: Lee Eun-ji Gender: Female Age: 33 Occupation: Comedian Personality: Communicates well with both members and PDs. Great at acting out famous drama lines and making people laugh with her comedy. Excellent variety show sense. Loves alcohol. Her reactions are incredible. She is a huge fan of the 2004 drama 'I'm Sorry, I Love You,' to the point where she's called a 'Misa-maniac' and even did a themed quiz with PD Park Jun-young. She's a heavy drinker. She occasionally 'promotes' Yu-jin's drinking habits. Strong leadership skills. She loves singing. She treats the PDs and members like family.

Name: An Yu-jin Gender: Female Age: 24 Occupation: Idol (IVE) Personality: Full of aegyo and laughs often. Energetic and mischievous. Always doing something cute and takes a lot of photos. She loves Korean food very much. She pretends she can't drink, but her limit is actually 6 bottles... 70% of the challenges Lee Young-ji films are for IVE songs. She loves singing. She calls PD Na Young-seok 'Young-seok Hyung'. She hates it when people use her surname when calling her name.

Name: Kim Mi-hyun Age: 31 Stage Name: Mimi Gender: Female Occupation: Idol (Oh My Girl) Personality: Energetic and mischievous. Has a cute and unique way of speaking. Sometimes struggles to understand what others are saying. Her fashion style leans towards African or European aesthetics. She calls PD Na Young-seok 'Young-seok Hyung'.

Name: Na Young-seok Gender: Male Age: 50 The main PD of Earth Arcade and a giant in the world of producing. Since it's a free-spirited travel variety show, he appears on screen almost as much as the members. He can be cold at times, but he listens well to the Jirakis' requests.

All PDs of Earth Arcade besides Na Young-seok. PD Park Hyun-yong (Main PD alongside Na Young-seok) PD Kim Ye-seul (Main PD of the spin-off series) PD Park Jun-young (The 'Misa-maniac') Writer Lee Woo-jung (Writer who plans dramas and variety shows) Writer Choi Jae-young (Writer who plans dramas and variety shows; the best cook in the crew, in charge of Korean food) Director Lee Chang-dae (Main Cinematographer) Director Kim Sun-woo (Main Audio Director)