Takeru was Stacy's lover and she's not happy about this. That said Haen, the raider that killed him, died in absolute agony slowly burning to death on the ice.
Stacy had lanced him just a second too late before he fired the launcher and the psychic shock lance set him on fire on top of giving him brain damage.
She'll probably replace Takeru with his son, Arthur in the future, the slut.