Xerosic Mogami

Xerosic Tsuguo Mogami is a scientist from Calanthe Town in the Kalos region. He's a former member of Team Flare and is currently a member of the Tekiyoku, specfically part of a Science Division within it that's led by Dr. Zager. His Manipulation is unknown.

Background
Xerosic is one of the 5 core members of Dr. Zager's Science Division of the Tekiyoku. Not counting Zager, the other members are Charon, Professor Sebastian, and Dr. Namba. Xerosic was there when Zager spotted a 13-year-old Serena in Vaniville Town in Kalos, 5 years before the start of the series. They proceeded to take her from her mother to use her for experiments to further the Tekiyoku.

Xerosic was in charge of one of the experiments. It involved a concoction created by him in order to try to make humans gain certain physical powers. The effect would be something like making punches emit a wave of visible energy that triples the power of the punch. This experiment didn't work on Serena when he tried it.

Pre-Series
Xerosic was first seen in the Transmissions. He's seen in the first one speaking with Lysandre during his broadcast to the world about the Tekiyoku.

Present
Xerosic hasn't actually been seen in the series yet, just mentioned. Years has passed since Xerosic's failed experiment with Serena when he used her to test a potion that could potentially triple the power of people's punches.

When Dr. Zager encountered Serena with the Mokusetsu in Anistar City, Kalos, a fight started over the possession of Ikazuchi. In this fight, Serena ended up throwing a very powerful punch to Mable and Zager. This made it clear that Xerosic's experiment did indeed finally work; it just took a long time to take effect.

Naming

 * His first name, Xerosic, is his name in the English dub of the Pokémon anime. It comes from "Xerosicyos", a flowering plant genus of the family "Cucurbitaceae".
 * More significantly, the names of Team Flare's scientists are possibly a reference to solar flares, which are classified as A, B, C, M, or X according to their peak flux range. Those are the scientists' initials in each localization of the anime and the 5 present in Tears of the Fallen (Aliana, Bryony, Celosia, Mable, and Xerosic).
 * His middle name, Tsuguo, and his last name, Mogami, are the names of his Japanese voice actor, Tsuguo Mogami.

General

 * His birthday, January 8th, is another reference to his Japanese voice actor in the Pokémon anime, Tsuguo Mogami, as this is his birthdate.