Of course, this relationship can't be guessed, so we should explore it slowly. But in my opinion, there is no such pure friendship between men and women. If two people are the same age, then they are more suitable to be lovers, but such a relationship still needs longer. Don't start to think each other is beautiful. In fact, men are tempted quickly, but they don't distinguish between what they like and what is love.
As girls, it takes longer to accept a man, because what they need to consider is whether two people's personalities get along. Of course, only such consideration can make the relationship between two people last longer. Therefore, it is such a truth that men chase women over mountains and mountains, and women chase men too much, because women will not be so easy to accept, while women chase men, and men are willing to accept such a relationship as long as they feel almost the same.
In fact, as a mentoring relationship, I don't think it's inappropriate to be a couple, because today's mentoring is not an ancient mentoring, but an old man's care for the new couple in the workplace.
Get along with each other gradually, and let the feelings of two people deepen. You can try to invite him to dinner and a movie in private. If she has accepted it, it means that two people can have further development.