Fruitful Alliance

 is a faction quest in.

Synopsis
Queen Onekaza has asked me to recruit the Wahaki tribe to her cause. Though confrontational and divisive, she feels that the tribe will prove a critical ally in the contentious days ahead. The tribe can be found on Ori o Koīki, a fiercely protected island of dense jungle, to the northwest of Neketaka.

Walkthrough

 * Leave Neketaka and head northwest towards Ori o Koīki. Once you get to the island, head east and speak to Kipeha - a tribe member keeping guard of the lift up to the village. She cautions you to head back to your ship (strangely in past-tense). Naturally, she won't be willing to let a bunch of strangers in, but you can convince her with one of the following:
 * and either the Deadfire Archipelago background or Streetwise 5 (Huana: Minor Positive)
 * Diplomacy 8 or Insight 9 to tell her that you desire a "deeper understanding of their tribe" (Pro-Huana) - the checks following don't matter.
 * Tell her that the Queen wishes an alliance with the Wahaki - using the treaty phrase "Over crumbling mountains, across blighted seas". If you fail to recall the phrase, she'll fire an arrow at your head (you can dodge it with Athletics 7) and put the tribe on alert.
 * If you've started the concurrent quest Tip of the Spear, you can warn them that the Crookspur slavers seek vengeance against the Wahiki tribe - the checks following don't matter.
 * Once you gain access to the village talk to the ranga, Ruāsare, to learn her terms: Wipe out the slavers at Crookspur and in return, she will support the crown.
 * After clearing out the slavers, and in the wake of Rauataian warships taking over Crookspur island, you have to pass a skill check (4 Streetwise / 5 Diplomacy) for her to accept the authority of the Queen.
 * This starts the quest Cruel Cargo. Complete this quest then return to the queen for your reward; and Major Positive reputation with Huana.
 * Otherwise, if you failed to gain access, started combat with the tribe, or if Ruāsare is killed, the quest will be over and you'll be forced to explain yourself to the Queen.