Pou Emotions
Pou has many feelings. Pou's feelings can be seen through Pou's facial reactions, perceived by Pou's eyes or mouth. Feelings cause Pou to behave in a certain way, being also influenced by the status bar.
Here are just the main ways to get Pou to stay with your certain emotion:
Very Happy
When all of Pou's stats are at their highest amounts, Pou will also be happier. This Pou feeling occurs when all of its stats are between 90 and 100%, but at least 3 of all statuses must be at that amount. Pou shows that it is very happy by laughing several times, opening a smile.
Status: 
Happy
This is Pou's most common status. By the way, 90% of all your emotions are happiness. In fact, for the developers, this feeling is called "Good", as it is where Pou is neither sad nor overly happy. It won't show anything, just its mouth will be in the shape of a small, simple smile. There is no appropriate status for this type of feeling, but as long as it is less than 90% (all statuses) and greater than 50% (all statuses).
Dissatisfied (Serious)
Pou will become serious if all of its stats are low, especially its fun bar. A common factor is that at least two status bars are less than 50% (not counting the health bar). Pou can also be unhappy even if all statuses are at 100%, but with the fun bar at zero (0%). Pou, when serious, will have a straight mouth. You can still pet Pou.
Sad
Pou will be sad if it hasn't played in a while and its fun bar is very low. It may also become sad if all attributes are zero or very low (both with the exception of food status). Pou's mouth is shaped with sadness.
Other Pou behaviors
Hunger
Pou becomes hungry when its hunger bar drops below 31%. When this happens, Pou's eyes are full of tears (moving from one side to the other, twice a second) and its mouth is serious. It also can happen when giving to Pou a hunger potion. You can't pet it at this state.
Status: 
Sick
Pou will become sick if its Health bar is less than 50%. Pou will have heavy eyes, and will have a large thermometer appearing next to its mouth.
Status: 
Trivia
- When Pou is hungry, Pou's hungry behavior overrides any of its other emotions. (For example, if it is sad and hungry at the same time, its mouth will not be in the shape of sadness, but in the standard shape of hunger).
- Unlike hunger, Pou's sick behavior will be visible alongside any other emotion.
- The value of statuses varies greatly. Read more about statuses.