Editing Jacen Solo (section)

===Dark Nest Crisis===
In ''[[Dark Nest]]'', Jacen feels an urge through the Force and follows his sister to the [[Star Wars galaxy#Unknown Regions|Unknown Regions]] to help the insectoid Killik against an invading [[Chiss]] force. He returns to Galactic Alliance space after his parents, resulting in his uncle and aunt to come for him, Jaina, and the other Jedi. He then travels to the Hapes Cluster to ask Tenel Ka to assist with the Chiss/Killik conflict, believing that the fleet could act as a buffer between the two armies. She obliges and sends a fleet of Hapan Battle Dragons to protect the Killiks.

In ''[[The Unseen Queen]]'', Tenel Ka gives birth to his daughter, [[List of minor Star Wars characters#Allana|Allana]], who is then attacked by the [[Gorog]]. Jacen successfully repels the attack and keeps his daughter safe. Possessed with a strong fear of his daughter or Tenel Ka being harmed, Jacen uses the Force to send Tenel Ka's grandmother (the person behind the attack) into a [[coma]]. Immediately afterward, he sees a vision of a neverending war that will destroy the galaxy, with the Killiks at the heart of it. Determined to save his daughter and the galaxy from his vision, he sets out to provoke the Chiss into destroying the Killiks. Jacen later reveals that he never knew who started the war in his vision.

In ''[[The Swarm War]]'', Luke Skywalker takes his nephew's advice so many times that he even listens when Jacen tells him that he is not ready to face [[Lomi Plo]], the Dark Queen of the Gorog. Jacen, Mara and Luke know that doubt and fear would make Lomi Plo invisible to her enemy. Jacen, along with [[R2-D2]], helps Luke conquer some of his fears about Mara's involvement with the death of his mother, and then accompanies him to face Plo.

During the fight with Plo, Luke falters for a moment when Mara is injured, and doubt enters his mind. Plo then holds him in place, unable to move. In that instant, Jacen is critically wounded by Plo while saving Mara Skywalker's life. A well-placed shot from Mara injures Plo, after which Mara tends to Jacen's wounds. While he and Mara recover, Jacen beseeches Luke to embrace his darker emotions. Luke refuses and goes back to the true Jedi way, defeating the Dark Queen and Raynar Thul without using the dark side.

In the latter novel, Jacen joins his uncle in watching holovideos of his grandparents, [[Anakin Skywalker]] and [[Padmé Amidala]]; in particular, he sees Anakin fall to the dark side and Padmé die in [[childbirth]] partly as a result of Anakin's treachery. (These scenes are first portrayed in ''[[Star Wars: Episode III – Revenge of the Sith]]''). Jacen actually sympathizes with Anakin's desire to protect his wife, and reminds Luke that Anakin was a fallible human being.