No man's woman

These sorts of appeals really bother me.

If indeed that girl was raped, she is certainly some father's little girl, and she could be some brother's sister. If she was your sister, would you refuse to come forward with the truth to protect the "code" among your teammates? That would be a really poor choice. The fact that she isn't your sister is irrelevant to the moral implications.

That's right; whether she's your sister is irrelevant. But who cares if the woman was someone else's daughter or sister? Her moral status as an individual does not depend on her relationship to another man. We don't live in some kind of tribal honor-based society where an offense against a daughter could be repaid by making restitution to her father. You do not get a free pass to rape people because they're not under male protection.