Chapter 551

'''Hayate no Gotoku! Chapter 551:''' Finale: What A Wonderful World 3 "Skyclad Observer"

Characters in Order of Appearance

 * 1) Aoi Himegami - appeared in flashback
 * 2) Hayate Ayasaki
 * 3) Maria
 * 4) Nagi Sanzenin
 * 5) Athena Tennousu
 * 6) Sakuya Aizawa
 * 7) Hisui Hatsushiba - mentioned
 * 8) Isumi Saginomiya - mentioned
 * 9) Ayumu Nishizawa
 * 10) Chiharu Harukaze
 * 11) Hinagiku Katsura
 * 12) Kayura Tsurugino

Trivia

 * The title of this chapter references the opening theme song "Skyclad Observer" from the anime series Steins Gate.