TV-Series
Description
Belzei Gertrude is a fictional antagonist from the anime series Futari wa Pretty Cure. He is one of the Seeds of Darkness, a trio of powerful warriors created by the Evil King following his initial defeat by the two main Cures. Belzei serves as the leader of this group and is considered the strongest among them.

In his true form, Belzei appears as an elderly but formidable figure. He has pale skin and light silver-white hair that stands up, with purple eyes. His attire consists of a purple spandex suit with wrappings around his arms and hands, complemented by purple claw-like facial markings. To blend into human society on Earth, he adopts the human alias of Yuuki Hidehiko, taking on the appearance of a small, distinguished older gentleman with grey hair worn back, small dark eyes, and a brown suit with a pale yellow shirt and striped tie. In this disguise, he works as a hospital director, a role that allows him to interact with the protagonists without revealing his true nature.

Personality-wise, Belzei is depicted as cunning, highly intelligent, and composed, yet prone to irritation with his fellow Seeds, Regine and Juna. His sharp intellect is a defining trait; he is able to deduce the incantation for the powerful Prism Stones through inference alone. As the leader, he carries himself with a sense of authority and is the primary recipient of the Evil King's direct commands, while his subordinates are often ignored. Despite his serious and quiet demeanor, he shares moments of exaggerated reaction, such as being startled by Regine's loud voice, a trait he exhibits alongside Juna.

Belzei's primary motivation shifts over the course of the story. Initially, his goal is to resurrect the Evil King by gathering the Prism Stones. However, he secretly harbors a deeper ambition. Aware that the Seeds of Darkness are intended to be sacrifices to contain the Evil King's destructive power, Belzei plots to betray his master. He aims to seize the power of the Prism Stones for himself and his allies to overthrow the Evil King and become the new rulers of the Dotsuku Zone, their home dimension. This desire for survival and autonomy drives his actions in the latter part of the series.

In combat, Belzei is a formidable opponent whose primary offensive ability is lightning-based attacks. He demonstrates incredible strength, once blocking a powerful combined attack from the Pretty Cure duo on his own. He also possesses the ability to use dark magic, such as creating bonds of darkness to restrain his enemies. Belzei is agile in battle despite his aged appearance, moving with surprising lightness. His role in the story is to serve as a major recurring threat, pushing the heroes to their limits while secretly working toward his own agenda.

Belzei's key relationships are primarily with his two comrades, Juna and Regine, and their master, the Evil King. He often finds his patience tested by their antics but ultimately forms a pact with them to betray the Evil King. In the series' climax, after gathering the Prism Stones, the three Seeds fuse into a single, giant being known as the Majin. In this fused state, Belzei's body, including his hair, turns completely black. The fused entity initially overpowers the Pretty Cures, but is ultimately defeated. Following their defeat, the combined being is absorbed by the Evil King, leading to the death of Belzei and his partners.