Technical mentorship trains up hard skills.
This may resemble a master-apprentice relationship in some ways, without the associated tenures—two junior engineers may mentor one another in the practices they have so far been exposed to.
A common relationship expectation would be that the mentee come prepared with questions or topics to guide the mentoring sessions in a way that is meaningful—through it is also useful for mentors to pay attention and bring up topics that the mentee may not by cognisant of needing exploration.