KallieCollab isn't just one person, it is a collab account used by two people, Kai and Oliver.
The name Kallie is just a fusion between "Ollie" and "Kai". 

Oliver: @planetollie (He/Him pronouns)
Kai: @kaisballsarehuge (He/They pronouns)

To differentiate between us we will use sign offs.

Examples: 
-Kai if he wrote the message. 
-Oliver if he wrote the message.