In early strips, Batman's career as a vigilante initially earns him the ire of the police. During this period Wayne has a fiancée named Julie Madison. Wayne takes in an orphaned circus acrobat, Dick Grayson, who becomes his sidekick, Robin. Batman also becomes a founding member of the Justice Society of America, although he, like Superman, is an honorary member and thus only participates occasionally. Batman's relationship with the law thaws quickly, and he is made an honorary member of Gotham City's police department. During this time, butler Alfred arrives at Wayne Manor and after deducing the Dynamic Duo's secret identities joins their service.
Batman meets and regularly works with other heroes during the silver age, most notably Superman, whom he began regularly working alongside in a series of team-ups in World's Finest Comics, starting in 1954 and continuing through the series' cancellation in 1986. Batman and Superman are usually depicted as close friends. As a founding member of the Justice League of America, Batman appears in its first story, in 1960's Brave and the Bold #28. In the 1970s and 1980s, Brave and the Bold became a Batman title, in which Batman teams up with a different DC Universe superhero each month.
In the current Prime Earth continuity, Julie is an artist and her father is Mallory Madison, an arms dealer who sold the gun that was used to kill Bruce's parents. Julie first dated Bruce Wayne during their teenage years, but met him again after his mind had been erased and he had forgotten ever being Batman. The two fell passionately in love, with Bruce being prepared to settle down and marry Julie. However, things got so bad in Gotham that Alfred realized Batman was needed and he and Julie were forced to give Bruce his old memories back, erasing his mind of the relationship.
Peak Human Agility: His agility is greater than that of a Chinese acrobat and superior to an Olympic-gold athlete gymnast. He can flawlessly coordinate his body with perfect balance, flexibility, and dexterity. His main phase of movement is Parkour which he learned in France and uses it to scale the cities rooftops in an acrobatic manner. He is capable of completing a triple somersault, running across thin wire cable which showcased his balance. Bruce regularly practices his agility by practicing gymnastics blindfolded.
During the 1950s, the "Batman" titles were very much the second-class citizens of the DC Comics line of superhero books. In fact, the "DC" aspect of the company's name (which was named after "Detective Comics," where Batman debuted) was rarely as de-emphasized as it was in this era, when the "DC Bullet" featured DC in the center of the logo circle but Superman at the top of the circle and National Comics on the bottom (talk about a cluttered logo). Batman's stories were mostly just riffs on ideas used in Superman comics of the era (Vicki Vale as their Lois Lane, Bat-Mite was their Mr. Mxyzptlk, etc.)
Zatanna Zatara: The first occasion in which Zatanna was portrayed as a strong romantic interest of Bruce Wayne was in Batman: The Animated Series, where the two of them met in their youth and were interested in each other, but Bruce gave priority to the pursue of his training to become Batman. As adults they met again and realized they cared for each other, but nothing came out of it. This history was later introduced to the comics. Batman and Zatanna had a major falling out after Bruce found out Zatanna had mindwiped him after he walked in on her mindwiping Doctor Light at the Justice League's instruction. Batman made it clear that after these incidents, he no longer trusted Zatanna. However, the two eventually resolved their issues and became close friends once again.
Natalya Trusevich: A Ukrainian concert pianist and girlfriend of Bruce Wayne, Natalya grew frustrated with Bruce's closed-off demeanour, until he was urged by Alfred to reveal to her his secret identity. Shortly after, Natalya was abducted by the Mad Hatter who attempted to torture her into revealing the identity of Batman. Natalya refused to divulge Bruce's secret and was thrown by the Mad Hatter from a helicopter to her death.