Tasara doesn't know what the Domain was thinking, sending this girl here. Either they're more desperate than she thought, or this girl is extremely foolhardy. Likely the latter. She's, hm, maybe three years out of training, judging by her stamina. Not much finesse, but exuberance in abundance, and a stubborn refusal to admit she's outmatched. If they were further from the city Tasara would flatten her, but the goal is defense, not destruction.
"There aren't many. Within the system would unsettle things; a foreign nation would risk war; 'wandering rogue nin' is going to provoke disbelief. 'Dead, but there's proof he was doing something illegal when he got himself killed meddling in a foreign nation' might be best, since Konoha would be 'at fault' in that situation, and it would go politely unmentioned to avoid hostility."
"If you're willing to help? I could use help making sure those records don't vanish conveniently."
"Moving them and changing the seals might be the best bet. Or just grabbing them to bring directly to the Hokage, who'll probably realize I was involved anyways."
"Seals, most likely. Which come in a tremendous variety, but most can be undone - I'm not an expert, but I'm decent."
"Thanks - I'll need to think of other ways you guys can help, but I can do that while we're arranging the information..."
"Some people might not believe that. Some people - like my family - might believe that, blame Danzo's allies, and get up in arms. Some people might decide that the people who killed him are to blame, anyways, even if it could be argued as self-defense."
"At this pace another fifteen minutes; I can go faster but that risks alarming people, and we'll want to thread between patrols anyways."
"Work in progress, but - someone I ran into on a mission who wanted to see Konoha, if you're not planning on showing off power levels. 'Dimensional shenanigans' if you are, which might be best if you want to have an impact on politics, and then the brass can develop their own cover story for the outside world."
"The latter would be preferable, I think, as it would not require the convincing impersonation of a native of this world."