Power
Aether hated the Midgardian's body, it was so unbeliveably weak, it was a terrible host. Jane would die soon, even if he didn't have plans to take control of her, he wanted another body ! A far stronger body as both males on the skiff were so and both had magic of their own. He knew the boy called Thor would never be a good host as he was in far too much love with the damned light. Yet, Loki would be perfect - the roiling lies, seething hatred and self-loathing that was so obvious to him...it was gorgeous ! He'd heard Loki's exclaimation about wanting to use him and he wanted that, it would feel so good. Almost like being back with Master Malekith.
He gathered himself enough to take over the girl's mind and body then opened his eyes. His red and black vision swept over the skiff, Loki and Thor were asleep as well. Slowly, he got up nearly falling over because of how top-heavy the body was before slinking up to Loki.
The boy reminded him of when Master Malekith was younger, so very pretty and just as powerful. One would have to have the magical sensitivity of a particularly stupid Midgardian rock not to feel the magic pouring off the lithe being. A moment later, he crouched before taking one of the dark-red skinned hands and moaned as the lovely darkness within Loki called to him. Also, the very strong, but dormant ice magic. Why could Loki not have found him instead of the girl ? Now, because he'd entered the girl, unless summoned by Master Malekith or the girl died he couldn't leave. Why. Did. It. Have. To. Be. So. Frustrating !
Loki's lips were soft, just like he'd imagined while watching that damned Fandral kiss Loki. Jane hadn't seen it, but illusions were light magic and he being darkness had seen through it. His touch had the far younger being's darkness 'pleading' for him to leave the girl, to know the love he had missed all those years while entrapped and alone. Suddenly, he jerked his head back, a hiss left his lips which stung because of the light magic that refused to die completely.
Perhaps when he rejoined Master Malekith he could persuade the Dark Elf to spare Loki. After all, surely the little jotun hated the Asgardians for stealing him from his true family. What better way to destroy that hated place than thanks to one the Asgardians had once trusted. If it worked it would be one of many reasons for Master Malekith to keep Loki alive. Aether went back to where the girl had slept and let his control vanish. For now, he was content.