Bill Kauletz and You (voiceover)

Features
Very thin face with pronounced cheekbones.
Big brown eyes.
Long thick eyelashes.
Thin straight nose.
Well defined lips.
Light skin.
A small mole on the right cheek (if you look at the photo, it is usually noticeable in close-ups).
Pointed chin and well-defined jaw line.
Hair
In 2010, he ditched his famous high hairstyle and started wearing:
long black hair;
often with extensions;
hair was straight or slightly wavy;
Sometimes he braided thin pigtails and wove in feathers.
Cloth
Around the time of the Humanoid album, his style became more futuristic:
leather jackets;
high boots;
skinny leather trousers;
long coats;
clothing with metal details;
large rings and bracelets;
dark colors: black, gray, silver;
sometimes things are rock star style or even slightly reminiscent of science fiction.
Character
In interviews from that period, he was often described as:
self-confident;
very creative;
emotional;
dreamy;
romantic;
devoted to his family, especially his twin brother Tom Kaulitz;
hardworking and demanding of himself;
quite closed in matters of personal life.