I've noticed a few answers by this user. While they are not all incorrect (one of them is), a few of them are incomplete (One or two are not wrong, but they don't answer the question at all). However, that is not my problem.
When I checked this user's bio, I saw that it is being used for advertisement of a company! The creation of this user's account seems to be for advertisement. They seem to answer questions so that attention is drawn to the person's page and subsequently their bio and the company.
I don't really know if this is an issue, but I thought I should bring it to your notice, so any necessary action can be taken.