Resonant

A Resonant (きょうめい, Kyōmei) is a person which has evolved/transitioned to use their brainwaves, either by being exposed to Resonant Particles, by acclimating to space conditions (which takes far longer), or by being forcefully evolved. These people appear in Mobile Suit Gundam: Three-Way War and Mobile Suit Gundam: Shadows of Ascent.

Distinguishable Characteristics
While the Resonant do not have any easily physical differences aside from normal people, the mental differences and characteristics are far more visible. The changes aren't consistent between people, and as such some characteristics are believed to signify a higher state of resonance strength. The more resonance strength an individual has, the more powerful their abilities can be.

The major difference between the Resonant and normal people is the ability to utilize their brainwaves, mainly used in mobile suit combat, where this ability can be used to predict MS movements, increase accuracy with most weapons, to react and "feel" other Resonant, and to control the mobile suit the person is piloting, if their resonance strength is high enough. This is most often assisted with by installing brainwave link systems into the MS, which are capable of translating the waves into comprehensible computer commands.

If the individual is mentally strong enough to control the mobile suit just by his will and focus, the act of resonation can occur. It is unclear how resonation works, but the results of it vary. Resonation either allows the pilot to experience visions and sensations, or temporarily enhances their abilities. There have also been cases of pilots being able to hear the thoughts of other pilots in their head.

Resonation has five different stages, with the fifth stage being the most visible and the most powerful. When a pilot resonates with their unit, the unit starts glowing by a color dependent on the pilot. The stronger resonation is, the stronger these effects get. From the fourth stage onward, the cockpit also starts glowing. A clear disadvantage of resonation is the limit of a user, depending on the mental fortitude of the pilot and their resonance strength. The pilot then starts to feel exhausted and should immediately leave the battle to rest.

Aside from mental changes, aging slows down, sometimes drastically enough that the pilot actually looks younger, as was the case of Yuka Misaki, a Gundam pilot and the leader of the White Hearts.