After becoming a Super Saiyan and whenever he wears a crown, his hair possessed a neon blue color with a tint of purple which appears purple whenever he finds himself in dark surroundings. Whenever he doesn’t wear a crown, his hair becomes golden. When he became a Legendary Super Saiyan, his hair still possessed a golden color with a tint of faint green, his height increased by a number of feet, his pupils disappear and his muscles became engorged.
While still in the form of a legendary Super Saiyan, his blood became dark green in color and it was seen on one occasion glowing. This was evident in “Broly – The Legendary Super Saiyan”, when he was injured by Goku and glowing green blood gushed out. It also occurred in “Broly – Second Coming” where his heart exploded and caused green blood to gush out after he was blasted into the Sun by the Family Kamehameha. However, we saw him shed red blood when he attained the status of Legendary Super Saiyan at the beginning of Second Coming.
The name “Broly” is unsurprisingly coined from vegetable broccoli. It was even referenced by Master Roshi in “Broly – The Legendary Super Saiyan” by Master Roshi. It follows a trend in Dragon Ball where several of its characters are named after food items.
At first, he appeared dopey-looking (which is not common among Saiyans) and docile. He however possesses the Saiyan instincts in battle and was conceived with a astonishing power level of 10, 000, which makes him get emotionally unbalanced sometimes. However, his father (Paragus) controlled his temperament with a special device. He became dominant after he was free from the grips of Paragus, and became destructive in nature which was evident when he was keen on destroying Planet Shamo.