New Poll Yu's Semblance in Potential in Remnant.

Personal Time Control

This Semblance allows Yu to accelerate his own personal time. It speeds up his blood flow, hemoglobin metabolism, and muscle movement all at the same time. Using this brief burst of speed, he can use his own physical skills and reaction speed at a level far above human limitations. Essentially allowing him to move faster, hit hard and evade much quicker than normal humans.

Cons- Can only be used on himself not on other targets.

When the burst of acceleration is over natural forces, the "universe’s own adjustment", will forcefully adjust the incorrect time. This places a large burden on Yu with each use, as place where the "errors in time have occurred" is within his own physical body. In order to get back in sync with the normal time flow, the adjustments occur within his body greatly damage him. Even brief use of higher teirs such as triple and quadruple acceleration risks internal bleeding, bone fracture and limb damage and continuous activation or multiple activations over a short period of time is nothing less than suicide, making it very risky to use.

Gravity Target

This Semblance allows Yu to manipulate gravities affects on a target, either lowering by several times it or raising it several times. For example lowering the affects of Gravity on himself can allow him to jump higher and go further than other people. Or increasing it can anchor himself to a spot. The same is true when used on others.

Cons- The more Gravity is changed the more Aura is required to maintain the change. The cost also increases with the number of targets. For example, a single target with 2x normal gravity may cost 10 units of Aura per second. Five for a single target and five for twice normal gravity. Four targets will require twenty five units twenty for four targets at five each and five for twice normal gravity. TL;DR more targets and more gravity change means more aura is required to fuel it.

(not gonna lie math is not my strong suit)

Mythical Weapon Transmutation

By using the power of his persona’s on his weapon. Yu can transform the weapon he is holding into a legendary or mythical weapon wielded by that persona complete with its powers. For example if a weapon is transformed into Dáinsleif wielded by King Hogni, then wounds inflicted by Dáinsleif will never heal.

Cons- When a weapon is transmuted the Persona associated with the weapon cannot be used. For example King Hogni cannot be summoned while Dáinsleif is being used. Additionally, when the mythical weapon returns to normal any curses or magic powers associated with it also vanish, allowing wounds that never heal for example, to heal as they usually would. Second, the transmutation is temporary, all weapons transmutated will always eventually vanish and return to normal. However, ordinary weapons made of ordinary metals will shatter due to being unable to withstand the strain of Persona powers. Divine Weapons like Totosuka-No-Tsurugi are an exception and instead will simply reject the transformation and forcefully return normal requiring a cooldown period of several minutes before it can be transformed again. Another exception are Nihil-steel metal alloys which also have cooldown periods, however no weapons of this material currently exist.

Paralysis Stare

As long as Yu is staring at the at a target they cannot move at all.

Cons – This Semblance requires constant Aura to be used and the longer Yu wishes to keep a target paralysed then the more Aura he must use over an extended period of time. In addition Yu must not break eye contact with his target, this means he must also not blink otherwise the target will be free to move again, forcing him to wait until his eyes are suitably ready to withstand using his semblance again.