(NOTE: DISPITE THE TERMS I USE THIS CHARACTER CAN BE BOTH GENDERS)

A Kuudere character is like snow: it may be cold and emotionless at first glance but it is also what keeps autumn's seeds warm and safe until spring.
The World Kuudere is a japanese world that is a cross between the words: "Kuuru" or "Cold" and "Deredere" or "Lovestruck"
Basically, while perhaps appearing cold and awfully pragmatic, it is but a frosty facade that protects tender and delicate feelings deep underneath, waiting for someone to who is attracted to them to warm their heart.
There are 3 types of this character:
Type 1/Always In Control: Comes off as "kuu-" (cool) because of emotional control, maintaining a calm, collected exterior. Expressions are subtle, with watery eyes being similar to bawling, and a small smile being similar to a giggle fit. Feelings may be filtered through snarky tendicies or dry wit. The appeal is their bluntness and directness, in contrast to shy reserve or boisterous rowdiness. If playing a Love Interest, either the other partner will be confusing as in where the relationship is going. They will eventually admit that they love eachother.
Type 2/Once You Get To Know Them: They will show the 'dere' side, but strangers and the untrusted will see the 'kuu' side. Friends all consider them to be caring and in private moments with them you may just catch them laughing with you. Although it will still be considered unusual. It's not that they spare friends any of the Snarky wit or that they don't act 'kuu' with them sometimes. The friends just understand it better than those that aren't close.
Type 3/Mood Swinger: Alternating between 'kuu-' and 'dere' persona depending on mood. What controls the mood? Some may have clearly defined Buttons that you don't want to press.
Either way all 3 are fickel people.