Another way to find good 'Borderlands Lilith x Naruto' fanfiction is by asking in relevant fan communities. There are forums dedicated to Borderlands and Naruto separately, and you can post a request for fanfictions that combine these two characters. Fellow fans might be able to recommend some hidden gems that you wouldn't find through normal search engines.
One possibility could be that Naruto finds himself transported to the Borderlands world and teams up with Lilith. Maybe Naruto's unique abilities like the Rasengan would be a great asset in the combat - filled Borderlands. His speed and strength could help Lilith in her battles against the various enemies in that universe.
It could be about Naruto being summoned to the Borderlands by some strange magic or technology. Once there, he meets Lilith and they start to fight together against the bandits and other threats. Naruto's ninjutsu would be really cool to see in the Borderlands setting.
One common theme is the clash of different powers. Naruto has his chakra - based abilities like the Rasengan, while Lilith has her Siren powers. Fanfictions often explore how these powers interact when they are in the same situation. For example, in a battle scenario.
One possible storyline could be them teaming up to take on a new and powerful enemy in the Borderlands. Maybe a new kind of Hyperion mech that has some unique abilities. They could start off not trusting each other fully, but as the battle progresses, they learn to work together better and form a deeper bond.
One interesting 'naruto x borderlands fanfiction' could be where Naruto's skills are combined with the chaotic world of Borderlands. For example, Naruto's ninjutsu might be used in the fight against the bandits in Borderlands. Maybe he uses his shadow clone jutsu to confuse the psychos.
I'm not sure about specific 'naruto x lilith fanfic' as there may not be a large number of widely known ones. You could try searching on fanfic websites like Fanfiction.net or Archive of Our Own. Maybe start by looking for Naruto crossovers and then specifically for those related to Lilith.
For Zero, his development could focus on his social skills. Since he's often a lone wolf, being around Lilith could make him more open and communicative. For example, he could start to crack jokes or share more of his past experiences with her.
Another one is 'Naruto and the Vault Hunters'. This fanfiction explores the idea of Naruto joining the Vault Hunters in their search for treasures in the Borderlands. It has a great plot that combines the unique elements of both Naruto and Borderlands, like Naruto's chakra use in the high - tech and dangerous world of Borderlands.
A simple plot could be that Noble Six is lost in the Borderlands and Lilith finds them. Lilith decides to help Noble Six get back home. Along the way, they encounter various threats like the Hyperion forces or some dangerous wildlife. They have to use their combined skills to survive.
There's also 'Naruto's Borderlands Adventure: Harem Edition'. In this fanfiction, Naruto finds himself mysteriously transported to the Borderlands. The story is engaging as it shows how Naruto's skills are adapted to the new environment. The harem aspect is well - developed, with different female characters from both Naruto and Borderlands showing an attraction to him, leading to some comical and also heart - warming moments.