Final answer:
The text provided does not mention a character named Sven or the story 'The Useless Ogre.' It talks about a character named Krogstad who used a trick to escape a situation, which led to his downfall.
Step-by-step explanation:
The excerpt provided appears to be from a conversation involving a character named Helmer and possibly relates to another character named Krogstad rather than a character named Sven or a story titled The Useless Ogre. Therefore, the details given do not correspond to a character named Sven.
Moreover, without additional context or information regarding The Useless Ogre, it is unclear what the outcome might be for the character Sven. From the provided text, we can infer that Krogstad, a character possibly from a different narrative, used a 'cunning trick' to escape a predicament, leading to his downfall or loss of status ('has gone under altogether').