Haha is responsible and sometimes a little bossy. As she’s the eldest she always tries to act like an adult in front of the other Momonsters.
Hehe is easily scared, shy and little pessimistic. He’s also a brain. His fears and uncertainty come from over-thinking things and he doesn’t like taking risks.
Huhu is cheerful and curious, but he can be selfish and stubborn. As he’s the youngest, he likes to imitate the older Momonsters, who always have to keep an eye on him.
Hoho is optimistic and easily distracted. He always goes with the flow and takes everything in stride. Hoho sees the world differently than the others.
Hihi is very enthusiastic, quite nervous and has a vivid imagination. She never seems to run out of energy, but she can make the dullest task incredibly exciting.