Which lawyer came with the high priest Ananias to present the case against Paul before Felix?

Answer: Tertullus

Five days later Ananias came with some elders and a lawyer (KJV: orator) named Tertullus to bring charges against Paul.

“Five days later the high priest Ananias came down with some elders and a lawyer named Tertullus, who presented to the governor their case against Paul.”— Acts 24:1 (BSB)