Possible Clues:

• Person who always looks on the bright side
• Distinguished Canadian service club member
• One always believes the glass is half-full
• One perpetually full of hope
• Glass-half-full person
• Hopeful person
• Bastille "How am I gonna be an ___ about this?"
• One always sees the glass as half-full
• "Glass half full" type
• One who always looks on the positive side