All too often the people i have encountered who have said " I am looking for a mentor" are sketchy to the point of being scary. These people are not just inexperienced so much as dangerously incompetent. Also, they have no concept of the climbing partnership as a two-way relationship. They are looking for an experienced climber to spend time with them with no regard for what the experienced climber will get out of it. These are the people who guides were made for. "The client is trying to kill the guide, the other clients, and himself".
After being "mentored" by a succession of more-experienced dangerous incompentents for several years, the climber will become capable of endangering larger groups of people, eg. as a scoutmaster or member of a rural search and rescue team.
I have climbed with climbers both way more and way less experienced with me and not once did i ever utter, or have uttered to, the mentor phrase. More than anything else if someone says to you " I am looking for a MENTOR!" that is a signal to get the hell out as soon as possible. For some reason people who get it in their heads that the solution to their problems is to find " a Mentor" are dangerous time bombs who are relatively incapable of becoming decent/safe/experienced climbers. I don't know why this is true, but it is.
Forewarned is forearmed.