Gaster is... kinda Dadster xdd - yes, Sans and Papyrus are his sons.

He's pretty calm. And... he is something like a healer... He have really good healing magic thanks to.....nevermind xdd

He's caring for every monster.

Such a good dad xddddd. Oh,.. he have about 45 years. xdd

(emotionless) No...you're right... I will stay here (caring/in stress) but- If ANYTHING will happen - call me immediately, ok???

(angry) What have you done?! Are you CRAZY??! (calming down) W-wait.... please.. don't cry (try to calm it down) I'm sorry Paps! please I'm sorry...shhh...