Well, in the MHA manga, Dabi does meet his end. It's a poignant moment that has significant implications for the story's progression and the dynamics among the characters.
He could start by simple things like creating ice cubes at will. Then progress to making small ice sculptures, which could later grow into larger and more complex ones. Eventually, he could learn to create ice storms or even entire ice landscapes.
Sure, Echo has powers. She can replicate the physical actions and skills of those she observes, which gives her a unique edge in battles and situations.
Trish has powers in the comics. Her powers typically involve enhanced strength, agility, and sometimes energy manipulation. These powers help her face various challenges and threats in the comic world.