original question: What character did the creator of [Bruce Wayne] also make?
answer: martha wayne, mr. freeze
answer type: Comic Book Character.
auxiliary information: Batman is a fictional superhero appearing in American comic books published by DC Comics. The character was created by artist Bob Kane and writer Bill Finger, and first appeared in Detective Comics #27. Originally named "the Bat-Man", the character is also referred to by such epithets as "the Caped Crusader", "the Dark Knight", and "the World's Greatest Detective". Batman's secret identity is Bruce Wayne, an American billionaire, playboy, philanthropist, and owner of the company Wayne Enterprises. Having witnessed the murder of his parents as a child, he swore revenge on criminals, an oath tempered with a sense of justice. Wayne trains himself both physically and intellectually and crafts a bat-inspired persona to fight crime. Batman operates in the fictional Gotham City, assisted by various supporting characters including his butler Alfred, the police commissioner Jim Gordon, and vigilante allies such as Robin.
What two additional comic book characters were developed by the creator of [Bruce Wayne] who also is known as Batman?