
Summary
- Usopp’s Observation Haki is almost guaranteed to evolve in Elbaph.
- Franky and Chopper could gain Armament Haki to increase their physical dominance.
- Sanji’s Observation could reach the Future Sight level.
- Nami’s unique Haki might be tied to weather intuition.
The Straw Hat Pirates’ voyage toward the mystifying Elbaph terrains produces widespread fan discussion about power upgrades for their crew members. Within their ranks, Luffy and Zoro demonstrate mastery of Haki while most others carry unexplored Haki capabilities. According to previous arc trends, Elbaph stands as an ideal location where characters with unawakened Haki skills or ambitions to improve their preparedness can refine their abilities.
In the Elbaph Arc, we should expect these members from Straw Hat’s crew to develop their Haki capabilities.
1. Usopp – Advanced Observation Haki
Observation Haki holds a clear potential for enhancement in Usopp. The signs of his developing Observation Haki began to manifest at Dressrosa when he shot Sugar without ever getting close enough for a clear shot. Since Elbaph stands as the home of the world’s greatest sea warriors it provides an ideal environment for Montobaru to develop his warrior skills toward becoming a brave naval fighter. Ussop is expected to power up in the Elbaph as he may start his dream of becoming the brave warrior of the sea from here.

Potential Power-Up
Future Sight: Just like Katakuri he gains advanced insight about adversary positions so he can deliver fatal shots that resist countermeasures.
Sniper’s Sixth Sense: Through further development of his intuitive targeting abilities Usopp would acquire an impenetrable shot while aiming at targets.
2. Nami - Observation Haki
Weather detection talent that Nami possesses might indicate the beginning of her latent Observation Haki capabilities. In the alabasta arc, Vivi gets surprised after seeing Nami’s navigational skill in the prediction of weather in the Grand line. Since she serves as the crew’s navigator her evolution of this skill would strengthen her ability to foresee dangerous environmental hazards also enemy attacks so she could provide the crew with more valuable information. Sensing weather changes through her Observation Haki links the character Nami to the ability Weather-Based Intuition.

Potential Power-Up
Weather Precognition: Her Observation Haki enabled her to detect energy signatures in the air which gave her warning about upcoming assaults and upcoming climatic phenomena.
Enhanced Reflexes: The enhanced reflexes of her dodging would improve significantly making her dynamic in battle conditions.
3. Chopper – Armament Haki (Monster Point Evolution)
The Monster Point transformation enables Chopper to fight mightily while he continues to find resistance while battling opponents equipped with Haki defense strength. His ability to use Armament Haki would let him enhance his combat moves as defense against high-skill opponents.

Potential Power-Up
Haki-Hardened Monster Point: With this advancement he could battle Zoan users at the level of Yonko while remaining powerful.
Haki-Infused Rumble Ball Transformations: By uniting his medical skills with Haki knowledge Chopper could evolve past his current transformation capabilities.
4. Robin - Armament Haki
The Hana Hana no Mi gives Robin the power to make huge limbs yet her enchanted limbs cannot match Haki’s resistance required to battle strong foes. Armament Haki’s submission would transform Robin’s enormous hands into a destruction capability she could weaponize through her advancement.

Potential Power-Up
Haki-Coated Giant Hands: Her enhanced strength allows her to smash down opponents effectively.
Haki-Based Defense: With this strong body protection the user would be better able to defend against external harm during power usage.
4. Sanji - Conqueror Haki
Future Sight remains out of Sanji’s reach although he already mastered Observation Haki preventing him from achieving complete invincibility in combat. For his remarkable speed skills, he would be perfectly equipped with this evolution. His extreme power up in the Wano arc gives a glimpse of him unlocking the Conqueror haki very soon and also being the left-handman of the future King of the Pirates this is something essential power up for Sanji.

Potential Power-Up
Future Sight: His dodging prowess achieved an impeccable level that equals Katakuri’s skills.
Flame Enhancement: Under Sanji’s Future Sight mastery he will find optimal moments to deploy Ifrit Jambe thus effectively maximizing its power.
6. Zoro - Observation Haki
Despite owning Conqueror’s Haki infusion Zoro maintains incomplete mastery of this power at its maximum capacity. With his stay at Elbaph he would find the perfect environment to learn better mastery of his Haki ability. For a swordsman the ability to analyse things in important which makes him important to unlock the Observation Haki in the upcoming battles. With his improved Conqueror haki he may reach up to the level of Oden and Roger in swordsmanship.

Potential Power-Up
Stronger Infusion with Kingly Ambition: The powers of his sword rotten in strength due to his improved slashing techniques.
Endurance Boost: Zoro’s battle resistance would strengthen at such a level that enemy Haki’s attacks would fail to stop him during combat situations.