We've seen Valfrey's code of honor, do the morps have their own codes they value?
Valfrey and the Morpho siblings each value very different attributes, with Valfrey being more so a middle ground between the siblings having been introduced to the way of the samurai by the both of them. (Keep in mind these rules apply to warriors, not so much the average person.)
Dream Eater (Forgo Land) Izanagi:
Do not kill unless absolutely necessary and preserve life wherever possible.
All battles must be fought fairly eye to eye.
Bend the truth if necessary to prevent harm.
Always keep yourself and your environment clean.
Always be polite and keep your emotions under control.
Eliminate all Undead you come across and do not engage in necromancy.
Prioritise duty and harmony above all else.
Retreating from a battle that can not be won is better than to die in battle.
Revenge is a fool's errand.
Do not perceive yourself as better than others.
Your average chivalrous knight. Meta Knight is a lot like them. It's close to the idealised ahistorical idea of a samurai warrior code.
Reborn Butterfly (Star Allies) Izanami
The more confirmed kills the better.
Do not deceive your own kin.
Hierarchies are to be respected but may be challenged through murder.
Disrespect is punished via duel.
Do not surrender yourself to sorrow.
Theft and deceit towards outsiders is encouraged.
The use of unfair battle tactics is encouraged as it shows intelligence.
Kill confirmation is typically done via “head taking” just like many real samurai did. After their rebirth, Izanami grew up to have very different values as Muthsera.
Value loyalty, courage and responsibility.
Eradicate evil wherever you find it.
Have fun whenever you can and enjoy yourself.
Hierarchies are only to be respected when the respect is earned.
In their combined form they fall somewhere in the middle, achieving a more neutral moral stance.
