Freddie happily skates around, smoking weed with his mates, and staying cool. He has problems taming his crazy friend Cook, who is not afraid to do anything. His other best friend JJ is an integral part of their friendship, as he acts as a mediator whenever there is a fight between Cook and Freddie. In the third series, Freddie's relationship with his family is strained due to his sister Karen attempting to use their mother's death in order to become famous. However, in the fourth series, he and Karen are much closer, having resolved all their differences.
Much of the third series deals with Freddie's romantic feelings for Effy and how that affects Cook, who also has fallen in love with her. Effy's decision to start a relationship with Cook although she has feelings for Freddie begins to deteriorate the friendship between Cook and Freddie. By the end of the series, Effy's choice in which she picks Freddie, pretty much destroys his friendship with Cook.
In the fourth series, Freddie and Effy both deal with the fallout of her decision, and thus are unsure how to talk to Cook. Throughout the series, Freddie and Cook's relationship is still strained, due to Cook's lingering feelings for Effy. Similarly, his relationship with Effy is put to the test when she starts having a mental breakdown; he's not sure whether he is strong enough to stay or if he's not able to handle it.
Freddie's profile on E4's official Skins website.