|Photo Credit by Gilfrost|
Jacob has been shown to a respectful, dignified gentlemen, continually basking his comrade August with praise as well as mentioning the holiday in Alakitasia where they revere the elderly, even wanting to pay respects to Makarov Dreyar, an elderly enemy. Due to his respectful nature, he shames the thought of nudity, or indecency, in regards to women, covering his eyes while looking away from the near sight of the act. He is also someone of a patronizing nature, as evidenced by taking a sharp jab at Jura for his baldness and then snickering at his own joke after the fact. Jacob can also be very demanding, tormenting Mavis Vermilion when giving her an ultimatum in order to save the guild's members lives in exchange for Fairy Heart's location. Despite all these traits, he does show a sense of loyalty toward his comrades, as shown when God Serena was being pressured by the Wizard Saints he was prepared to intervene and he was very enraged at the sight of God Serena being felled by Acnologia and immediately geared himself to retaliate, before August warned him it was a futile gesture against an opponent of Acnologia's caliber.
Stealth (ステルス Suterusu): Also known as Assassination Magic (暗殺魔法 Ansatsu Mahō), Jacob is a master at using this it, and it has three distinct abilities; the first ability allows Jacob to erase his own presence, wherein he wipes out his ability to be seen, heard or smelled, thus allowing him to move about completely undetected, even if he was seen by people just prior. This physical invisibility can be negated by Magic that utilizes light, such as Regulus. Stealth's second ability allows Jacob to see things that would normally be invisible to others, such as Mavis to non-Fairy Tail members, and as such allows him to converse with, attack, and touch beings like her. Interestingly, it would appear that Jacob cannot actually see what he, himself, has made invisible with his Magic during its effect. The final function of Jacob's Magic is to attack with invisible weapons, which he displayed in his torture of Mavis, as well as in his ensuing conflict with Natsu and Lucy, using invisible knives and a whip, among other things.