Iso is pretty egotistical, she's a confident young lady with ambition and goals clearly defined in her life, she is aware of what she wants, unlike most teens.
Being the main character, she has the most amount of lines and is the character that the rest depend on!

Line Directions:
Line One - Smug, she's definitely proud of herself.
Line Two -  neutral/happy-ish.
Line Three - Confident, excited, Smug.