Collectors

Collectors are persons who are part of the coin hunt game prompted by Alien.

Description
Collectors usually find in groups a certain amount of coins to get a wish from Alien, in order to obtain a new wish or undo a wish already fulfilled. While a collector can search a coin by himself, there are groups with members working together in order to achieve a common goal. According to Sayaka, all collectors have the goal to obtain 100 coins, and in order to obtain them, the majority of them would murder other collectors, making the game a battle royale.

Known Collectors´ groups, goals, and members
Koyanagi´s Group

this is the group with the most known members shown throughout history. Their first goal is to stop the coin hunt game. Although the original goal remains, stopping Honoka and Kaito became the group's main goal, for reasons other than Elena's. Elena´s Group
 * Sayaka Koyanagi
 * Yota Murakami
 * Ikeuchi (defected)
 * Chihiro Yoshioka
 * Isao Kasuga
 * Miku Aihara
 * Shuichi Kagaya
 * Claire Aoki

This is the group with the strongest members. Their goal is to defeat Kaito. Madoka´s Group Kaito´s Group
 * Elena Aoki
 * Naoto
 * Subaru
 * Sakuma
 * Madoka (deceased)
 * Morita (unknown)
 * Abukawa (deceased)
 * Hanakawa (unknown)
 * Sudo (murdered by Tadanori)
 * Kaito
 * Honoka
 * Shiraishi