I'm a big fan of Hellraiser, so naturally I love kytons (velstracs, as they call themselves, as written in Planar Adventures). Thanks to whoever made them into Pathfinder the way they are.
I'm gonna play one (kind DM taking my love for the thing in consideration, evil campaign, powerful PCs, begin at level 5, in Cheliax), and long story short a 3pp class will give me two other velstracs as allies.
Now this is were I need you.
I dont have any idea for the design of these lovely creatures that I don't find too closely related to Clive Barker's work. So I thought, why not asking here for some ? You can do only visual appearance, and I'll do the rest, or if you want you can stat and name your creation, even writing about his background. Rules are : Kyton subtype, and CR10.
I lobe body horror, so no mutilation is "too hardcore" for me (and my fellow players are ok with it too), just keep in mind that it must be correct enough for these boards. Other than that, your creativity and your possibly twisted minds don't have limitations, even in rules, as we allow any 3pp stuff and even stuff from DnD 3.5 and the like (but if you use this kind of things, please provide a link, for I may not know what is this thing you're using).
As a sidenote, I'm new here, so if I make mistakes let me know. And I'm not a native english speaker, so I'm sorry if my approximative comprehension of your language disturb you.
TL;DR : I need some ideas for two kytons (CR10) appearance (you can provide more than just appearance if you like to). Feel free to add. Also I'm new.