Friender is a mid boss fought three times in Schwer's Rosenkreuzstilette Freudenstachel stage, the Zeppy Ruins.

They attack by shooting a curved wave of fire that can be dodged fairly easy with the correct timing. Despite being a mini-boss, Friender can be frozen with Eisschwert and skipped all together. Alternatively the player can take a secret passage to skip all three of them. If the player should choose to fight them, however, they are weak to Frostfackel.