Hook is playing a game called "Guess the Flower Color" with her friends.
She invited Julian, Luka, and Big Sister/Big Brother who always plays with them — and stuck a flower in each one's hair. There are four flowers — two white, two purple — and nobody including Hook looked at their own flower nor anybody else's flower.
Next, she asked everyone to step forward and form a line. Hook, Julian, Luka, and then Big Sister/Big Brother stood in order. Only looking at the person straight ahead is allowed, and nobody may turn around or peek at anyone else's flower.
To keep things fair, Hook blindfolded Big Sister/Big Brother — because she/he's so tall!
However, while they can't see their own flowers, we can see them as we walk by: Hook and Luka have white flowers, while Julian and Big Sister/Big Brother have purple ones.
Despite Hook's best and fairest intentions, only one person in this game will be able to guess what color the flower they have on their head is. Who is that person?
1. Hook
2. Julian
3. Luka
4. Big Sister/Big Brother