I actually go by

[Tinkerbell]

“Finn!” Aislinn snapped. Huh. So at least one of the Brannicks hated me. Weirdly, that made me feel better. That was normal. And if there was one thing I knew how to deal with, it was Mean Girls.
“I actually go by Sophie.”

I actually go by?

[5jj]

It perhaps means 'People generally call me Sophie'. We'd need more context to be sure.

[SoothingDave]

Yes, that's how i read it.

"I use the name 'Sophie.'"

[bhaisahab]

Yes, that's how i read it.

"I use the name 'Sophie.'"

I agree.