Esper moves at a normal pace in a straight line until it collides with a block, bomb, or other enemy, at which point it pauses, chooses a random direction, and then continues to move. It may choose to reverse directions even if it is not at a dead end. It will harm the player on collision.
If Esper lines up horizontally or vertically with a bomb, and there are no walls or other bombs between them, it will use its telekinetic power to detonate that bomb after a brief moment. While its powers are activated, Esper is invincible. However, it will be rendered powerless for a period of time afterward. If it detects a bomb while powerless, it will run toward the bomb repeatedly in vain until it is destroyed or until it regains its power.
In Super Bomberman 5, it does not pause when changing directions, and when it tries to detonate a bomb, it must slowly move a telekinetic ring from its own body to the bomb.
- Super Bomberman 4 Hudson Official Guidebook, pg. 23,37