Rīkuu

Rīkuu is a major antagonist in the Null series, especially during the Brother Rescue arc and Heaven No More arc. He is a founder of the Jero Clan, and an extremely powerful and deceptive spy since a very young age, having used Lab Co. to gain information and weaponry in the past by pretending to side with them. His father is Time, and his mother has remained unrevealed to the story and is presumably a surrogate, considering that Time once stated to Chris Valentine that his purpose for having a son was simply to serve as an heir to his legacy.

He and Chris have a sort of unspoken parallel between them. They also both wear opposite colored headbands, symbolizing that they are one in the same, but are split in their desires of evil versus good.

Early life
Rīkuu was born and raised in the City of Thieves on Sira Island by his father, who was notorious for being a very powerful sorceror and local thug. He would often spy on Lab Co. conferences in order to gain information about creating bombs, and share the information with his father. He also used his spying techniques in his adolescence to forewarn his father about a bombing strike planned for Sira Island from Lab Co. during the Pink Star arc.

Dissolve with Sira clan
After the events of the Pink Star arc, Time and Rīkuu fled Sira to find a more remote location, where they wouldn't be discovered as malefactors and possibly killed for their crimes, finding a rural area on Lua Island.

Formation of the Jero Clan
Rīkuu began to manipulate Inko Valentine to recruit him as a member of a new clan of very powerful beings that seek nothing but to fulfill world order under their domination. They successfully abducted and re-educated him, upon which they arrived at Jero Island (formerly Flemic Island), and massacred the native peoples, marking the annexation of the island as a working empire for the Jero Clan.

Role in the Brother Rescue arc
Convinced in a pure rage that he needed to become more than human, Rīkuu had Petaseaze subject him to some sort of biological engineering that would allow himself to change his physical form to disguise himself. During Chris Valentine's mission to rescue and recover Inko unharmed, Rīkuu was frequently pulling strings to divert Chris and lead him off of his path, making him one of the most centered antagonists of the arc. This is mostly evident in disguising himself as Christina Valentine, Ontay, and confronting Chris while transformed as a giant spider he refers to as Heliax.