I’ve featured a lot of different types of dildos on this blog up to now. Tentacle dildos, dragon dildos, unicorn dildos, and of course, my personal faves: sparkly dildos! A demon dildo, though, is a new one on me. Based on the mythical creature of the same name, today we’re looking at the ONI by Mr Hankey’s Toys.
What is the Mr Hankey’s ONI?
The ONI by Mr Hankey’s Toys is a silicone dildo available in four sizes, ranging from Small (7.1″ insertable length, 1.87″ diameter at the widest point) through Medium, L/XL, up to XXL (12.75″ insertable length, 3.26″ diameter at the widest point.) Since even the smallest of these sizes is by no means “small”, I might be inclined to rename them Large, Extra Large, Fucking Enormous, and Oh My God Are You Actually Kidding?, but that’s just me.

The ONI dildo features a demon face, complete with horns, in the centre of the shaft. It is ultra curved and heavily textured along all sides, with ridges, swirls and bumps. It has a thick shaft at the bottom that tapers up to a slimmer head.
Like most Mr Hankey’s toys, it is highly customizable. You can choose from the four sizes I’ve already mentioned, four firmness levels, and 25 colours. You can also add a metallic effect and a Vac-u-Lock hole for a sex machine, if you like.
I received the ONI in size Medium, which measures 10.75″ in total length, 9″ in insertable length, and 2.33″ in diameter at the widest point. I chose metallic green in medium firmness with no Vac-u-Lock hole.
ONI Demon Dildo: What I Liked
I was drawn to the ONI because it’s so different to anything I’ve tried before. I wasn’t really sure if it would work for me. But I had to try it just because I don’t have anything similar in my collection. My experience with textured toys has been mixed.

My first observation about the ONI is that it’s not really a toy I can thrust with. The in-and-out motion means that the ridges and bumps along the back irritate my sensitive vaginal walls pretty quickly. This is much more a “put it in and enjoy the sensation” kind of toy. (Which is actually convenient because it’s also heavy as fuck, so I imagine thrusting with it would become pretty tiring pretty quickly!)
Here’s what else I liked about the ONI:
- It really is very aesthetically pleasing! I don’t have a monster/demon kink, but I love this dildo’s combination of ornate swirls and the beast-like ridges along the back of the shaft. The metallic green shade I chose is gorgeous. I suppose red would have been more traditional, but I like my toys in bright and unexpected colours.
- The tapered tip makes the size far more manageable than many of the extra large toys I’ve tried. By beginning with a slimmer end that gradually widens, the user’s body can warm up and open up to gradually take more of the toy.
- That curve tho! The ONI’s curve is so pronounced that you can get amazing G-spot or prostate stimulation from even just using the first two or three inches. Since the chances of me getting this entire toy inside me are slim-to-none, I appreciate that I can enjoy it even so.
- When I’m in the mood for it, I do enjoy the texture. I chose the medium firmness, which is a good balance between allowing the texture to be fully felt and ensuring it doesn’t become “so intense it’s painful.”
- Even with the medium-firm density of the silicone, it still has a decent amount of flex and a little squish to it. This, too, aids in comfortable insertion and use.
- That little lip that sticks out at the base of the shaft could theoretically stimulate the clitoris when the toy is inserted all the way. I can’t actually use it like that because, as I mentioned, there’s no way this entire thing is getting inside me. But you potentially could, if that’s your thing! It’s a cool design feature, anyway.
Bonus pro tip: if you have a clit and you can position the toy suitably to make this work, the texture on both sides of the shaft feels amazing for grinding on. You’re welcome.
Potential Downsides and Things to Consider

Like many Mr Hankey’s products, the ONI is… sizeable, to say the least. The combination of the large size and the heavy texturing will mean it won’t work for everyone. If you’re new to textured toys, I recommend getting the smaller size, and if you’re new to extra large toys I suggest starting with a smoother one before you try something like this.
This is a toy that requires a lot of warm-up and a lot of lube. It’s large, it has a lot of texture, and the silicone is pretty matte. This isn’t a “get off quickly and go” type of toy!
Due to the intense curve of this one, it stands up okay on its own but doesn’t balance very well when you apply any kind of pressure or movement. If you’re someone who likes to use your dildos hands-free, this probably isn’t the one for you.
All the ridges and little nooks can make the ONI a bit of a pain to clean. Boiling it is the best way to remove bodily fluids and kill off bacteria between uses.
ONI Demon Dildo: Verdict

A gamble of a choice for me, but one that paid off! This toy is unique and different, with a fantastic curve (thank you!) and some interesting texturing. It’s sure to appeal to monster fans, fantasy toy aficionados and serious texture lovers. I can’t honestly say it’s going to enter my regular rotation of toys, as my tastes generally skew towards smaller, smoother, and simpler, but it’ll definitely get some occasional use.
The ONI demon dildo retails starting from $119.95 for the small size. Larger sizes and additional customisations increase the price accordingly.
Thanks to Mr Hankey’s Toys for sending me this product and for sponsoring this review! All views are, as always, mine.