Will Longbottom (icarus_me; 5th year; Hufflepuff) - He's the third child of Neville Longbototm and Hannah Abbbott. He can be loud and obnoxious. Most of the time it is not an act. He does ~care sometimes. Currently he's dating Lily Potter.
Brooke Summers (happygome; 7th year; Salem beater) - She's a generally friendly person and chillax. She doesn't tend to pick fights with people unless it's concerning something very dear to her. If Leicester is cool with her, she's cool with him.
Lala Bradley (notabarbie; 7th year; Slytherin) - Vocal about her opinions, Lala is a flirt, but has been dating the same guy since fifth year. She's not afraid to say what she thinks, even if it's not a popular opinion. She doesn't discriminate based on blood/house as Lala thinks that's a load of crack (she's also adopted and her siblings were all sorted into different houses). She'll happily trade barbs with him.
Viola Rosier (primandproperly; 5th year; Gryffindor) - The youngest child of Pansy Parkinson, Viola may have been raised with purist ideals, but she's learning to break out of those stereotypes. She's extremely polite and tries to be helpful where she can, but can be easily started/hurt. Feel free to have Leicester pick on/tease her.
Aidan de Groen (this journal; 6th year; Beauxbâtons keeper) - He can come across as an ass (though the title is often deserved), but there is a heart of in there, somewhere. Aidan's intent on becoming a professional Quidditch player, playing for the team his father played for and eventually playing for the Dutch national team. Speaking of being Dutch, Aidan is very vocal that he is not French and quite proud of his Dutch heritage. His family makes Jötunheimr Brandewijn (iced brandywine), a wizarding liquor.