Definitely. Both the Riddler and Hush are familiar figures in comics. They have distinct characteristics and play significant roles in various comic story arcs.
It's not a straightforward yes or no. The Riddler's behavior regarding killing in the comics is inconsistent. Sometimes he's driven to extreme measures and takes lives, while in other instances, he refrains from outright murder and sticks to his intellectual challenges.
Penguin and Riddler are typically not friends. They often operate independently and may even compete or have conflicts with each other in the comic universe.
One of the best is 'The War of Jokes and Riddles' arc. It shows the complex relationship between Batman and the Riddler, with the Riddler creating chaos in Gotham as part of a grand plan. The psychological warfare and the clever riddles make it a great read.
In a top - notch Riddler story, the Riddler sets up a grand scheme. He creates a set of riddles that are linked to different locations in the city. Each riddle reveals a part of his overall plan. Batman has to race against time to solve these riddles. The Riddler's story here is about his obsession with proving his superiority over Batman through his riddle - making skills. He believes that if Batman can't solve his riddles, he is the smarter one. And throughout the story, we see the cat - and - mouse game between them unfold in an exciting way.