3 Tests Of Nen Type In Hunter X Hunter

Water Divination

The most popular way of determining one's aura type in Hunter X Hunter is through Water Divination. This divination requires one to float a leaf atop a glass of water. A student of Nen will place their hands around the glass and perform Ren. The resulting effect from one's aura contacting the glass will determine a person's aura type.

If the volume of the water changes, then the user is an Enhancer.
If the taste of the water changes, then the user is a Transmuter.
If impurities appear in the water, then the user is a Conjurer.
If the color of the water changes, then the user is an Emitter.
If the leaf moves on the water's surface, then the user is a Manipulator.
If a completely different change appears, then the user is a Specialist.

Hisoka's Personality Test

Hiso-Hiso's Aura-based Personality Analysis or is a Nen-type identification method invented by Hisoka by which he claims that he can judge a person's Nen-type based on their personality. This method is no more reliable than trying to discover someone's zodiac sign or blood type from just a personality analysis. According to his theory:

Enhancers are simple and determined. Most of them never lie, hide nothing, and are very straightforward in their actions or in their thinking. Their words and actions are often dominated by their feelings. They are generally very selfish and focused on their goals. This is reflected in their Nen as Enhancers typically rely on simple and uncomplicated Nen abilities.
Transmuters are whimsical, prone to deceit, and fickle. Transmutation users have unique attitudes, and many are regarded as weirdos or tricksters. Often they put forth a facade while hiding the truer aspects of their personalities. Even when they don't hide their personalities they rarely reveal their true intentions. Many Transmuters rely on techniques that give unique and unpredictable properties to their Nen that reflects their personalities.
Emitters are impatient, not detail-oriented, short-tempered, and quick to react in a volatile manner. They resemble the Enhancers in building their impulsivity, but the difference between them is that Emitters probably tend to calm down and forget easier. Because of the nature of Emission, many Nen abilities created by Emitters are primarily long range.
Conjurers are typically high-strung or overly serious, stoic, and nervous. They are often on guard as to be cautious. They are very observant and logical, rarely falling into traps. Being able to analyze things calmly is the strength of Conjurers. Many of the items that Conjurers create are often used by them in a very deliberate and practical, logical fashion.
Manipulators are argumentative and logical. They advance at their own pace and tend to want to keep their families and loved ones safe. On the other hand, when it comes to pursuing their own goals, they do not listen to what others might have to say about it. While Manipulators often use techniques that allow them to control their opponents, some choose an inanimate medium to control.
Specialists are independent and charismatic. They won't say anything important on them and will refrain from being close friends, but, because of their natural charisma that draws others, they are always surrounded by many people. Because Specialization is unique and can have many facets, most Specialists possess only one Nen ability.

Telltale Signs

Furykov was able to construct a system to identify Nen users and their Nen types through observation alone, which he claimed is the result of his experience. According to him, a way to differentiate between Nen users and non-users is that the outline of the former's iris, when looked at from the side, appears discontinuous. A person's Nen category can be determined through some habits of theirs and the flow of their Ten:

Enhancers and Transmuters, depending on their level of skill, have a soft, quiet Ten that shrouds the part of their body that activates their favorite attacks.
Emitters and Manipulators generally have a broader Ten, and if they attempt to shrink it, their aura will appear darker. Manipulators also tend to want to keep their dominant hand free, as it is generally the one used for their abilities.
Conjurers have strong aura around the part that activates their favorite abilities and a much gentler flow everywhere else. Like Manipulators, they will also prefer to keep their dominant hand free.