The defending player is the player Hans Eriksson is attacking or the controller of the planeswalker Hans Eriksson is attacking.

Putting a creature card onto the battlefield this way causes a second reflexive triggered ability to trigger. Players may respond to this ability before it resolves.

If the creature card you put onto the battlefield isn't on the battlefield or isn't a creature as the reflexive triggered ability resolves, neither that creature nor Hans will deal or be dealt damage. The same is true if Hans isn't on the battlefield or isn't a creature at that time.