"As it was first observed once he arrived into the player's present, Dusknoir appears to be very knowledgeable and warm with everyone he interacted with in Treasure Town and extended his knowledge and warmth to Wigglytuff's Guild; however, this is only a facade. Dusknoir's true personality is that he is a Pokémon bent on making sure the future stays as dark as twisted and will go to no ends to make sure this goal is achieved. Dusknoir's true nature is foreshadowed as he appeared to faintly smile (only observed by the player) when the player revealed their name to him at the beach when the player and their partner show Dusknoir where the player was found.

Dusknoir's nature is expanded in the Special Episode In the Future of Darkness where he revealed to Grovyle that all he wants is to exist without disappearing prematurely (via restoring the Time Gears and time in the past). Dusknoir revealed to have an intense hatred for Grovyle, evidenced by when he was about to advance upon him after returning to the future, but that changed after Dusknoir saved Grovyle from a falling chunk of ice suspended in midair, albeit part of a secret plan, and Grovyle had a heart-to-heart with Dusknoir. Dusknoir's twisted personality dissipated once Grovyle was about to lose his life and came to his rescue and changed his ways to help Grovyle and Celebi stop Primal Dialga from causing unthinkable calamities by crossing through a Passage of Time.

Regardless of his being an antagonist or a partner to Grovyle, Dusknoir is shown to have a great amount of loyalty to one he chooses to be aligned with, indicating him to be something of a follower than a leader, but after he changes his heart, he shows a great deal of dedication to helping Grovyle and Celebi restore the future."