Her shyness really cute

"Am I interrupting something?" Delphine asked with a small smile, but Aether knew it was far from genuine. Her eyes held an icy intensity, betraying her underlying emotions.

Aria's cheeks flushed a deep, rosy red as she stammered, "O-Of course not, Professor Delphine... I am just teaching him our language."

"Language... ah," Delphine mused thoughtfully, her gaze fixed on the notes. She remembered Aether's background as a slave who might not have learned to write. 'Tsk, how did I forget that!' she scolded herself inwardly. Her eyes flicked back to the notes, her smile widening as she read the words. "Hmm... Exactly what kind of words is he learning?" Her smile turned almost predatory.

Aria flinched, her face burning as she looked at the notes. The words 'I love you,' 'Kiss me,' and 'Night-time' stood out starkly. She stammered even more, "T-Those words... for... for... It was like I teach him..." Her embarrassment grew so intense that Aether had to step in.