This paper toy is a chibi Riku Miyagusuku, the adopted brother of Kai and Saya, the youngest of George Miyagusuku's three adopted children and Saya's second chevalier, appears in the Blood+ (pronounced as "Blood Plus") anime series, the papercraft was created by Larry-San.
Even though the youngest of the Miyagusuku family, Riku is shown to be more mature than Kai, his elder brother.
Riku is a very kind and intelligent boy. He loves to cook. His gentle nature even rubs off on the reclusive Hagi to some degree, particularly after he brings Hagi a plate of food and asks him to join the others. Hagi teaches Riku how to play the cello and protects him from a bad injury after Riku falls from a moving train.
A good-looking boy whose apparent age is 14 years old, Riku is 4'3" (130 cm) in height and weighs 85 lbs (38.5 kg). He has neatly-combed brown hair with a fringe and brown eyes. After his transformation, Riku wears black suit given by Joel VI, similar to Haji's and Solomon's attire. [Source: wikia]
You can download this papercraft toy here: Blood+ - Chibi Riku Miyagusuku Free Paper Toy Download [Instruction]