addersnap is still an apprentice in his mind's eye. he would believe himself to have already been on a list of "no's" for flamestar's mentor list -- but since he did pass his exam with some relative ease, the young warrior would find himself surprised to even be bestowed with such an honor. adder would be a very disciplined mentor, especially with this being his first apprentice, believing that if he had the same type of push from his first mentor that he would have succeeded beyond his expectations (despite it being his own fault for not having the motivation to excel in his abilities). it would be expected of this apprentice to try and be the best of the best; adder would not want to disappoint leafhusk and shame her name or role in the clan. his apprentice would go through rigorous tests, focusing mostly on what they may be struggling with in that current moment. they wouldn't train with many other apprentices however (unless addersnap gets assigned more than one apprentice). since adder prefers to stick to his own still, there may only be a select few he truly would believe would be alright to train with his apprentice. he wouldn't want any outside opinions to possibly sway the "next leader of thunderclan," as he would like to think of them. focuses more on tracking and hunting than combat.
since addersnap already struggles with the idea of the younger generation and conversing with them, he may speak in little words and harsh tones towards his apprentice, but deep down he does have their best interest in mind. he may do better with someone who matches his personality, someone quiet and reserved yet hardworking and determined. over time, he will develop a sense of kinship with his apprentice and want to look out for what best fits their needs. this will take time and lots of prying, but the feeling of protectiveness and the want to see his apprentice succeed will ultimately keep him from ruining a relationship with them.