Yori catches the brief hesitation over the term. If Rinzler hasn't mentioned it to Chara before, maybe Chara won't understand? It's not the way most Users define themselves.

But Rinzler certainly meant it as a useful category for an ally to belong to. Chara doesn't look unhappy. She's satisfied.

"Good," she accepts the translation of her threat, and prods the portal once more. "I don't trust this thing in the least, but I'm trying to have more faith in my allies."

Even though her calculation doesn't always back that up. Because calculation can't ever inspire faith.