She pauses for a moment, considering the question. This means more to her than she usually admits to; giving her word, swearing on something. It's not something that can be coerced, demanded from her, but when she gives it to someone, it's about the most serious and genuine thing she has to offer. It's not something she gives easily, but Sonia matters in complicated ways. She sighs quietly, lips thinning.

"My name? It's how they do things here, isn't it?" There's a touch of a deflection to it, but only in that she's trying to avoid admitting how much it means to her. The last thing she wants is to explain why it matters.