Her Chakra Suppression Technique would have made her perfect for undercover work and infiltration.
Danzo would have maxed out Karin's Mind's Eye of the Kagura Technique, which can determine the following from a distance the exceeds 10 kilometers in distance.
Example, Karin could have sensed the Sands betrayal at the chunin exams.
Danzo would have maxed out Karin's Mind's Eye of the Kagura Technique, which can determine the following from a distance the exceeds 10 kilometers in distance.
- Honesty and dishonesty.
- Determine exact quantitative numbers.
- Power Levels.
- Emotions.
- Village Affliction.
- Perceive locations and movements with great detail.
- Determine, lock then track someone based off other their specific/unique chakra signature.
- Instantly determine if genjutsu is being used.
Example, Karin could have sensed the Sands betrayal at the chunin exams.