While most Kalashtar is very compassionate, empathic, and really like to meet new people, it’s unclear whether they are empaths in the truest sense of the word. However, since the lore does state that they need to spend a lot of time controlling their emotions since that can lead to psychic backlash if they don’t, you can roleplay them as such. Maybe your Kalshtar will need to meditate or otherwise use tools to avoid emotional situations or might seek to be a peacemaker or diplomat to calm everyone down. You can even have them lose control for a while and make more psi attacks than they are used to. It’s up to the player and the DM for what they want to do, but it will be fun no matter what.