You can always get a Ryori with a set of traits you like and use pet dye to make it whatever color you want! It's probably easier and more efficient if you buy diamonds and purchase greater pet dye with it, but you can get lesser pet dyes for 1000 scales each (you get one scale for every egg or hatchling you nurture, you can always go to the "Help Nurture Sylesties" tab at the top of your hatchery to nurture other people's pets).

Egg nurturing rules:
Egg is warm: press "cool the egg" or whatever it is
Cool: warm the egg
Restless: turn the egg
Dull: polish the egg

Hatching nurturing rules:
Hatchling is restless: play with them
Derpy: read it a book
Slow: race with it
Hungry: offer it food
Weak: work out with it

Or, you can do what I've been doing: If you have a few themed pets you can breed (if you need any, let me know, I'm cheap), I've been offering four free themed eggs in exchange for a dye. I thought it was a good deal, idk

is there a specific set of traits you like? I might be able to find you something : )

(sorry for this really long post)

nah I just want a Ryori, I don't really care what traits it has

If you go here: https://www.sylestia.com/search/ and click on Search Pets you can find pet people are selling using the filters, such as species: Ryori

and then near the bottom of the filters click For Sale and change it to Yes and change Order By to Sale Price Ascending

you can do this with any kind of pet you want and add in traits you want with the filters :)