Jerboa has pale yellow scales. She is tall, long-necked, and graceful, with wide black eyes and a dappled light brown triangle pattern on her wings.
Jerboa is quiet and thoughtful, similar to Moonwatcher, and also appears to be kind and considerate. Despite being an animus, she doesn't seem to use her magic much. She is shown to welcome and trust others easily — such as when taking care of Luna and welcoming Moon and Qibli into her hut, despite them being strangers. She seems to dislike animus magic very much, even though she herself is an animus dragon. She seems to hate the attention of the IceWings her powers give her, shown at the end of The Poison Jungle when she thinks "useless, just like I've always wanted" when she reveals animus magic is broken to Snowfall.
Jerboa was first seen in Darkstalker's palace for a few split seconds by Turtle when she was summoned along with all other existing animus dragons. Jerboa then disappeared with a surprised expression, leaving Turtle to believe he imagined her.
She makes another mysterious appearance in the epilogue of Darkness of Dragons when she leads Moonwatcher and Qibli into her home to meet her. She then confirms to the two dragonets that she is the daughter of the first Jerboa, and that she is immortal. Jerboa shows them an injured dragon, who she has been taking care of. The dragon is Luna, a SilkWing from Pantala.
Jerboa appears in the epilogue when she finds Luna, lost and severely injured on one of the Kingdom of Sand's beaches. Jerboa says that it is lucky Luna speaks Dragon. She introduces herself to Luna, and Luna does the same. Jerboa brings the lost SilkWing to her home and offers her fish stew, but Luna declines, saying that she doesn't eat meat. She welcomes Moon and Qibli when they arrive and brings them to Luna, as seen in the Darkness of Dragons epilogue.
Her hut is mentioned twice in the prologue. She is also mentioned when Tsunami asks if she can enchant something for Luna to get back to Pantala, but Moonwatcher says that she is an animus that doesn't use her magic.
In the epilogue, Jerboa II is seen flying to the edge of the Ice Kingdom to meet Snowfall. It's revealed that Jerboa II knew the current Queen's late mother as Jerboa thinks how Queen Glacier usually arrived after she did when they met up. Queen Snowfall, already traumatized by Darkstalker's return and paranoid about getting attacked, is panicking about the sight of hundreds of dragons flying in from across the ocean. She wants Jerboa to expand the Great Ice Cliff, but Jerboa stops her, proving that her animus magic did not work anymore, also stating that no one else's animus magic was working either. It was also said that after Queen Snowfall flew away in a fit of rage, Jerboa thought to herself: "Completely useless. [...] Yes. Just like I've always wanted." It is also likely that the hundreds of dragons flying towards them is the group of SilkWings and LeafWings that are coming to Pyrrhia to escape The Othermind, along with Cricket.
Her mother, Jerboa the First, enchanted her to make sure nothing could hurt her. This seems to have resulted in her immortality.
Jerboa is the second known dragon to have immortality.
It is implied that Jerboa has information about all the animus magic disappearing, as this was hinted in The Poison Jungle when she thought, "Completely useless, [...] Yes. Just like I've always wanted."
Tui has hinted that someone (a 'she') knows more than she is revealing of the situation going on at Pantala. This may be Jerboa II.