Of course it was Loki. It's always Loki.

But. My hammer," said Thor.
"Shut up, Thor," said Loki

Well?" said Loki. "What about you, Heimdall? Do you have any suggestions?"
"I do," said Heimdall. "But you won't like it."
Thor banged his fist down upon the table. "It does not matter whether or not we like it," he said. "We are gods! There is nothing that any of us gathered here would not do to get back Mjollnir, the hammer of the gods. Tell us your idea, and if it is a good idea, we will like it."
"You won't like it," said Heimdall.
"We will like it!" said Thor.
"Well," said Heimdall, "I think we should dress Thor as a bride. Have him put on the necklace of the Brisings. Have him wear a bridal crown. Stuff his dress so he looks like a woman. Veil his face. We'll have him wear keys that jingle, as women do, drape him with jewels -"
"I don't like it!" said Thor. "People will think... well, for a start they'll think I dress up in women's clothes. Absolutely out of the question. I don't like it. I am definitely not going to be wearing a bridal veil. None of us like this idea, do we? Terrible, terrible idea. I've got a beard. I can't shave off my beard."
"Shut up, Thor," said Loki son of Laufey. "It's an excellent idea.

Cease your weeping!" he said. "It is I, Loki, here to rescue you!"
Idunn glared at him with red-rimmed eyes. "It is you who are the source of my troubles." she said.
"Well, perhaps. But that was so long ago. That was yesterday's Loki. Today's Loki is here to save you and take you home.

Loki was trying to look serious, but even so, he was smiling at the corners of his mouth. It was not a reassuring smile.

He is tolerated by the gods, perhaps because his stratagems and plans save them as often as they get them into trouble.

Loki makes the world more interesting but less safe. He is the father of monsters, the author of woes, the sly god.