Initially, Layla harbored reservations.
She was not okay with Eren assuming the identity of Leo Longblade to infiltrate the City of Lancelot, mainly due to Leo's affiliation with the Asikha Empire. She argued that during times of war, the city might not welcome an individual with foreign ties over its own citizens.
However, Eren adamantly insisted on adopting Leo's persona, driven by his foresight into the aftermath of the Lazarus Project. While Layla's concerns were centered solely around the project itself, Eren contemplated the far-reaching consequences once it reached fruition. He understood that regardless of the project's success, Leo Longblade would inevitably attract the attention of Edinburgh and potentially face persecution from the Anfang Alliance.