Ys Wiki
Ys Wiki

The Monstrums (怪人 (かいじん) , Kaijin?) are a group of enigmatic individuals with supernatural gifts and a knack for turning up when least expected. Their mysterious abilities and strange attire have earned them both notoriety and ire from the many denizens of Balduq.


The Monstrums were established by Aprilis in order to defeat the constant waves of Lemures in the Grimwald Nox. Most of the Monstrums were originally normal civilians who were shot by Aprilis with an alchemy bullet, which turned them into Monstrums capable of changing their forms and using supernatural gifts like running up walls or gliding.

Aprilis and the Monstrums refer to this as a curse, because the Monstrums are obstructed by barriers surrounding the region from leaving Balduq, and the Monstrums are also not allowed to fight each other as the aggressor will be restrained.

Ys 9 Logo.png Spoiler warning!
This section contains plot details of Ys IX: Monstrum Nox.
Do not read it if you have not played the game and intend to play the game in the future.

The truth is that Aprilis, along with all most of the Monstrums are homunculi created by the alchemist Zola. They were originally planned to be raised and trained by the older version of themselves, Aprilis, and Zola. But when Zola disappeared and the previous generations of Monstrums died, Aprilis found the job too difficult to do by herself. So she faked their identities as war orphans and sent them away to be adopted. Once they became old enough to join the fight in the Grimwald Nox, she seeked them out and activated their power with an alchemy bullet.

After the Grimwald Nox was gone, all the Monstrums lost their Gifts.

List of Monstrums[]

Name Gift Function Meter Exhaust[1]
Crimson King Crimson Line Fly to the nearest pre-determined spot 10% per use
75% on enemies
White Cat Heaven's Run Run up vertical walls 30% per second
Hawk Hunter's Descent Glide across a short distance 20% per second
Doll Third Eye See hidden traces or keypoints 2% per second
Raging Bull Valkyrie Hammer Break through cracked walls
Break defending enemies
40% per use
Renegade Shadow Dive Go under passages too low to enter
Avoid detection
17.5% per second

Fake Monstrums[]

Three criminals who dress up as Hawk, Doll and White Cat in order to frame the real Monstrums in the theft of a valuable statue from Rijndael Antiques.

Name Faking
Gordo Hawk
Toto Doll
Pak White Cat



  • In an interview, Toshihiro Kondo stated that they wanted to justify the vertical movement in Ys IX: Monstrum Nox, so the idea that came from this was "superheroes"; which when converted to Ys became the Monstrums.[2]