Jeannette
In response, the heartless strolls over, before perching on the ground once more as it looks at the wayfinders.

Almost instinctively, due to past memories, it picks it up while looking at it for a few moments.

Then, suddenly, it looks up at dado as it places the wayfinder on its chest. It seems to understand it.
Christine
"Holy shit..." *It understands. So much for dog-like; this thing's just a feral mute person.*

"Alright. You, uhh... You try to reach out to my Heart if you're in trouble. If I can, I'll be there." *Hopefully before it's too late. He'd hate to see a Keyblade Wielder off it when it's helping them.*
Jeannette
It nods, letting the wayfinder linger on its chest for a few moments. The way it carries itself is as if its lost in what could almost be in a trance, before its attention snaps back to dado.

It claps its hands together in acknowledgement, before a pitch black puddle opens just behind it. Following this, it ties the string of the wayfinder on its wrist. 

With one final wave, it allows itself to roll backwards into the puddle, dropping into it and sinking as if the ocean. Essentially a ``dark corridor.``
Christine
*Dado flies away, perplexed at the friendly Heartless.*