Tigrerra is Runo's Guardian Bakugan. She is from the Tigrerra Species living in Haos: a space attributed to light.
Tigrerra is very human in nature. She is very kind and protective, and she often has moments where she uses language such as 'my lady'. Tigrerra trusts Runo completely, and she is prepared to protect her no matter what.
Inside her body is a gigantic blade, capable of cutting any substance in the human world, and she is a powerful opponent in battle.
Tigrerra evolves into Blade Tigrerra.