You can delete AlarmMon characters in ‘Character Selection’ screen.

1) Go to character selection screen : Press ‘+’ button > ‘Alarm’

2) Click the trash can  on the upper right corner of the screen

3) For all AlarmMon characters which can be erased, ‘-’ button will be displayed on the upper right corner of icon. Click the ‘-’ button.

4) A popup will be displayed asking whether you wish to remove the selected Alarmmon. Click ‘OK’ to delete the character.

5) You can confirm that the selected Alarmmon has disappeared on your character list.