As they were practicing, Dharvey and Arlo were already in character as they saw the both of them adlib the lines of the story.
They didn't follow what the characters of the story said, and just delivered lines that are related to the ones the characters of The Necklace wanted to portray.
Seeing the both of them engrossed with their lines, the three, Frey, Arvid, and Angeal, widened their eyes in amazement as they watched Arlo and Dharvey exchange their lines, their acting on point.
They could have a high grade for their performance!
"How could you be so poor," Dharvey complained as she crossed her arms in front of her chest then scoffed. "You married a beautiful woman with high standards... yet you couldn't provide what I need! I thought you love me!"
"I do, Mathilde... I really do!" Arlo gave Dharvey an embrace from the back, making the girl roll her eyes at him. "What do you want me to do, darling?"
Were your assumptions about Dharvey right? ;)