Their balance is off, and they would benefit from the use of a cane.
For example, you may sell walking canes. A customer persona is a person who is older, perhaps over the age of 60, and who has trouble walking due to knee or hip problems. Their balance is off, and they would benefit from the use of a cane. You might further differentiate this persona by saying that they are still mobile enough not to need a walker. The more specific you can be in your persona, the better your target marketing will be to this group.