When she heard what Elsa said, Choko had no doubt: "My sister is behind this."
Jair who just got back and although he didn't hear everything, knew what happened nodded in agreement. Not just him, Jana, and Breno, but even Nero agreed with what Choko said.
The girl's description, while previously pure, matched the descriptions of Choko's former friend and current friend of Maia Qin, Choko's sister.
Even knowing it wasn't Eliane, Elsa wasn't happy. While it's not her this time, it doesn't change what she's done in the past, nor does it change the fact that at any moment she could try to take Nero's life.
"But when did she arrive in the Empire?" Jana didn't expect Maia to be so obstinate in following Choko to the Nan Empire just because she hated her. It was simply meaningless, irrational.
Elsa was lost. She didn't know much about Choko's family situation.