Answer the question: why is your character with this party?
This is a team game. The goal is for all people around the table to have fun. Loners and psychopaths and characters that betray parties are not fun for everyone at the table. Your characters must act as a team.
Additionally, I am making it your job to tell me why these characters are all travelling together.
The opportunity to join factions has been extended to the original characters. If you wish to bring in a new character who is a faction member, that will probably be OK. Talk to me about it.
How does your character know this half-elven cleric? Have they met in the past? Were they friends? Enemies? Lovers? Rivals? What does your character think of the goddess Tymora? Was your character surprised the first time they saw Garaele in weapons and armour, with no trace of the flighty, easily-distracted girl she is normally?