Doudanuki Masakuni is on the SS Caprine with Justice, but he's not exactly a mortal.
Doudanuki is a spirit himself - a tsukumogami, a type of spirit that possesses an object after 100 years if it is well cared for. His object is a sword, and due to video game shenanigans, he's been granted a physical human body he can manifest himself as. He's also the amalgamation of every sword ever crafted under his name - Doudanuki Masakuni being the name more of his smith and crafting area than the actual name of a sword. As such he has latent memories of every sword ever smithed under his name.
SO!
Read surface-level thoughts: Sure, because of his human body, Justice might be able to hear some of his thoughts. As a spirit, they might resonate a little more closely with each other though.
Read deeper memories: Suuuure...but considering his swords have been largely neglected, melted down, or abandoned over the centuries, there's a lot to unpack there.
Read memories on objects: He can do this as long as it isn't Doudanuki's sword. He doesn't let anyone touch his sword since it's his real body and thus where his actual soul resides. If Justice reaches for it, he's likely to get angry and/or push him away.
Invisibility/Forgetting: Going to say no on these. He can already demanifest himself (basically retreat back into his sword) so there's no need to be invisible. And having people mess with his memories is a big no since his memories are shared with every sword ever made under his name.
Possession: Not...sure if he can possess another spirit?
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Doudanuki is a spirit himself - a tsukumogami, a type of spirit that possesses an object after 100 years if it is well cared for. His object is a sword, and due to video game shenanigans, he's been granted a physical human body he can manifest himself as. He's also the amalgamation of every sword ever crafted under his name - Doudanuki Masakuni being the name more of his smith and crafting area than the actual name of a sword. As such he has latent memories of every sword ever smithed under his name.
SO!
Read surface-level thoughts: Sure, because of his human body, Justice might be able to hear some of his thoughts. As a spirit, they might resonate a little more closely with each other though.
Read deeper memories: Suuuure...but considering his swords have been largely neglected, melted down, or abandoned over the centuries, there's a lot to unpack there.
Read memories on objects: He can do this as long as it isn't Doudanuki's sword. He doesn't let anyone touch his sword since it's his real body and thus where his actual soul resides. If Justice reaches for it, he's likely to get angry and/or push him away.
Invisibility/Forgetting: Going to say no on these. He can already demanifest himself (basically retreat back into his sword) so there's no need to be invisible. And having people mess with his memories is a big no since his memories are shared with every sword ever made under his name.
Possession: Not...sure if he can possess another spirit?
Alterations: If it goes there, we can discuss.