His character was shown dumb, in the trailer he's this big celebrity and in the drama he's roaming around like a love sick fool who is entitled.
These shows not only showcased their skills but also shared their day-to-day schedule with the audience from the moment they began their training to their debut.
You need to get yourself out there as much as possible.
Kat keeps to herself and is known for being reserved and a bit of a shrew.