Beni immigrated to Hisui from an unspecified region, after he and Kamado's hometown was burned down by maddened Pokémon. Kamado and Beni started their new life in Jubilife Village, where Beni opened up the Wallflower on Floaro Main Street. His signature dish is potato mochi, made using Sootfoot Roots. His signature Smoke Bombs are also made from Sootfoot Roots. He serves people of Jubilife Village, as well as members of the Galaxy Team between expeditions.
During the game's climax, Beni obstructs the player's way at the Stone Portal on Mount Coronet, under the direction of Kamado. Using a Smoke Bomb, he changes into ninja attire, and tells the player about his experience as a ninja in his younger years. He challenges the player to battle, and after being defeated, Beni acknowledges his respect for the player's skills, and asks them to bring Kamado to reason.
If the player talks to Beni at the Wallflower with any Sootfoot Roots in their satchel, Beni will offer to buy them from the player for 100 apiece.
"Have you all heard the grave news? That frenzied Kleavor from the rumors... It ended up mauling some of our Galaxy folks who went out to investigate it this morning. The Medical Corps has had a hard time getting all the injured back on their feet..."
After quelling Kleavor
"The whole village is gossiping up a storm about our young friend here, you know. He's/She's got quite some luck to have come back unharmed after facing off against that Kleavor."
"Sorry about having to shutter the Wallflower. I'd much rather be there now, serving up some freshly grilled potato mochi."
"But that taskmaster Kamado's gone and left me to oversee our food supply. He always finds a way to put even these old bones to work..."
"While I'm handling that, I suppose I'll handle you as well. Time we got rid of you once and for all."
Regardless of choice: "I'll make myself plain. As Kamado's right hand, I'm charged with executing all the gritty deeds Kamado can't or won't do himself. I gave him my word I'd get rid of any fools that might dream of getting in the way of his plans."
"And besides, it's not just Kamado who longs to live in a new home free of fear or strife. His dream is mine now, too."
"You've seen my Smoke Bombs before, right? Well, this is how you're meant to use them!"
"When I heard you managed to quell those nobles one after another, oh, did it ever make my blood run hot and my heart pound... At last...at last..."
"One final opponent worthy of my great ninja techniques that have been left to molder all these long years!"
Upon being defeated
"It seems my ninja techniques will soon be consigned to history..."
After being defeated
"Very good, young one. Very good indeed."
"It's only a foolish ninja who tried to keep after a target they know they cannot beat..."
"And to be honest, I don't hate you. Might actually like you, after a fashion. At least for the skill you show in battle. But listen well, <player>: Pokémon are truly terrifying creatures."
"Kamado and I saw our hometown burned to the ground by maddened Pokémon running amok—we lost plenty of friends and comrades that day. That's why Kamado came here to Hisui to try to build a new home where people could live free from fear. But to achieve something truly great, you sometimes have to take extreme actions."
"If—hypothetical as it may be—a Pokémon were to appear from within that space-time rift... Kamado might lose hold of his reason."
"Save Kamado from himself. By force, if you must."
"Do that, and I'll stuff you full of more delicious potato mochi than a human stomach can handle."
Jubilife Village - Wallflower
If talked to after completing the main story
"I did what I came to do here in Hisui. Now I suppose it's time for me to head someplace with a more agreeable climate."
Jubilife Village - Photography Studio
In normal clothing
"I'm collecting keepsakes of the people who ate the most potato mochi! Come on, you! Let's get a snap of the two of us."
In ninja attire
"A ninja's clothes are meant to blend in and hide. I'm testing to see if they show up in photographs. Want to take a photo with me while I'm at it?"
Beni's Pokémon Cards listed with a blue background are only legal to use in the current Expanded format. Cards listed with a silver background are legal to use in both the current Standard and Expanded formats.