CR7 - The one who genuinely follows football or the one who claims to love football just coz Ronaldo is hot! 
Panda - That one person in every group whose permanent name has become 'Panda'. And that is either coz he /she is cute and fluffy.... Or is Black, white and Asian. 
Alien - That one person who always acts strange and weird or the one who actual is a devil alien inside a Human body plotting your death silently