In the year X791, Natsu's attire receives minor changes.He now wears an open-collared, one-sleeved version of his original waistcoat, which is instead tucked in and zipped.Natsu has also defeated his opponents with pure wit, rather than brute strength.
The second is when Lucy comes crashing into him while nude, and he stares at her body, even groping her breasts for a moment.
Natsu continuously tries to prove his strength to others.
Lucy has brown eyes and shoulder length blonde hair that is usually tied by ribbons in a variety of colors in a small ponytail to the right side of her head with the rest of the hair loose.
However, in the year X791 she appears to keep her hair up more often in pigtails. Her (presumed) measurements are: bust, 91 cm; waist, 59 cm; and hip, 88 cm (36 in, 24 in, 35 in).
In spite of his naturally dense nature, Natsu is quite perceptive and understanding of his friend's feelings.
After his battle with Gildarts during the S-Class Mage Promotion Trial, Natsu came to understand and accept fear, and has used this acceptance to help his guildmates and himself emotionally grow.
At various points in time, he has challenged Erza, Laxus, Mirajane, and even Gildarts (in short, all of Fairy Tail's current S-Class Mages), to fight him, albeit, he was beaten every single time.
Despite his losses, Natsu bears them no ill will, as he considers everyone in the guild to be his family.
He demonstrates this attitude even towards former enemies.
Natsu has even gone as far as defending Laxus from being expelled, despite his attempt at taking over the guild.
Natsu rarely exhibits any perverse tendencies towards the opposite sex, there only being two noted instances.