Well, one possible plot element could be the female werewolf showing some form of affection or possessiveness towards the guy through this action. It might be a way of marking him as hers in the werewolf lore within the fanfic.
In some cases, it could be part of a transformation or initiation process. Maybe the guy is new to the werewolf world and the female werewolf's lick has some special significance, like passing on power or knowledge. Another aspect could be that it's a sign of a budding romantic relationship, where the lick is a very unique and animalistic way of expressing feelings in the context of the werewolf nature.
The lick could also be a form of protection. The female werewolf might sense danger for the guy and by licking him, she is either warding off other werewolves or some other supernatural threats. It could also be related to a pack - related ritual where the female werewolf is accepting the guy into the pack in a rather intimate way.
I'm sorry, I don't have specific fanfics to recommend for this rather unique concept. You could try searching on fanfic platforms like Archive of Our Own or Fanfiction.net using relevant keywords.
One common theme could be a sense of the supernatural and the unknown. The female werewolf represents a being that is both alluring and dangerous, so there might be a theme of danger and attraction. For example, the male reader might be initially scared but then gradually become entranced by the werewolf.
Female werewolves are frequently shown to be very protective. Whether it's of their pack, their family (if they have a human family in the story), or their territory. Their protective nature can be a key part of their character arc, leading them to engage in battles or take risks to safeguard what they hold dear.
One common element could be the use of the tickling and licking actions as a form of interaction between characters. It might be used to show affection or playfulness.
Power dynamics are also frequently explored. The Volturi are extremely powerful in their own right, and a female Harry Potter would also have her own set of powers. So, there's often a back - and - forth as they try to gauge each other's strength. Maybe she shows off some unique magic that the Volturi have never seen before, or they use their mind - control abilities on her, only to find she has some resistance due to her own magical training. Another common element is the element of danger. The Volturi are not known for their kindness to outsiders, so the female Harry Potter is usually in a precarious situation, trying to find a way to either escape or gain their favor.
One common theme is the fish - out - of - water scenario. The guy is often out of place in the world of powerful female Marvel characters, which creates a lot of comical and interesting situations.
I'm not sure there are really established 'common elements' for such a specific kind of fanfic. However, typically in a story about a nerd girl, there might be elements of her being highly intelligent, perhaps having a love for academic subjects. As for the 'tickle' and 'lick' parts, if it's not in an inappropriate way, it could be part of some kind of affectionate or playful interaction between characters.
One common plot element is her combat skills. Many fanfics will feature her in intense fight scenes. Another is her relationships with other characters, which could be friendly or antagonistic.
Often, in 'naruto fem itachi' fanfics, her abilities are re - imagined. She might have a different fighting style or use her Sharingan in new and unique ways. Also, her interactions with other characters like Naruto can be a big part of the plot. For instance, she could be a mentor figure to Naruto, teaching him some Uchiha - specific skills or knowledge. And her presence might change the dynamics of the Akatsuki as well, if the fanfic involves that organization.
A common plot element is Percy facing a powerful enemy while trying to save Athena. This enemy could be a new mythological creature or an old foe with a new twist.