4-Star Princes

4-Star princes can be obtained in-game in the case of Seras and Navi, or in the regular gacha. They have 5 chapters prior to Awakening and 3 after.

Acedia (アケディア​)
Adiel (アディエル​)
Almari (アルマリ)
Altair (アルタイル)
Banri (万里)
Beul (ベウル)

Camilo (カミロ)
Capita (キャピタ)
Castor (カストル)
Chrono (クロノ)
Dayang (ダヤン)
Droite (ドロワット)
Frites (フリッツ)
Fujime (藤目)
Gauche (ゴーシュ)
Grad (グラッド)

Haku (ハク)
Hikage (陽影)
Ira (イラ)
Iria (イリア)
Jet (ジェット)
Juno (ユーノ)
Kalt (カルト)
Kanoto (カノト)

Keith (キース)
Legrange (ルグランジュ)

Leonie (レオニー)

Makoto (真琴)
Marchia (マーチア)
Martin (マルタン)
Michiru (ミチル)
Miya (ミヤ)
Morta (モルタ)
Navi (ナビ)

Nayuta (那由多)​
Nepenthes (ネペンテス)
Prytwen (プリトヴェン)
Raven (レイヴン)
Rege (レジェ)

Ritz (リッツ)

Rosso (ロッソ)

Sai (サイ)

Sarasa (サラサ)
Seras (セラス)
Sieg (ジーク)
Sorbge (ソルベージュ)
Synny (シュニー)
Tell (テル)
Thor (トール)

Tiga (ティーガ)
Tormari (トルマリ)
Toya (凍哉)

Vairy (ヴァイリー)
Volker (フォルカー)
Welger (ウェルガー)

Collab-Exclusive Princes

Collab-exclusive princes can only be obtained while the collaboration event is running. They do not appear in choices for custom gachas, nor can they be exchanged for outside of the event. As such, it is difficult to acquire their stories.

Shinkai Kanata (深海奏汰) from ‘Enstars’
Nishina Kazuki (仁科カヅキ) from ‘Kinpri’
Snake (スネーク) from ‘Black Butler’
Ronald (ロナルド) from ‘Black Butler’
Yuri Plisetsky (ユーリ) from ‘Yuri on Ice’
Akutagawa Ryunosuke (芥川龍之介) from ‘Bungo Stray Dogs’
Okita Souji (沖田総司) from ‘Hakuoki’
Envy (エンヴィー) from ‘Fullmetal Alchemist’
Gudetama (ぐでたま) from ‘Gudetama’

Tamago (たまご) from the 2017 April Fools Event