Orisoni is composed of four worlds, three of which are terrestrials while one is a gas giant. Egalic has eezo resources coveted by the Elkoss Combine, but negotiations with the asari stalled in light of the Reaper invasion. As only Niacal is habitable, the Reapers focused their attacks on this world.

Egalic

Egalic is the fourth planet orbiting the star Orisoni.

Main article: Egalic

Kralla

Kralla is the third planet orbiting the star Orisoni.

Main article: Kralla

Niacal

Niacal is the second planet orbiting the star Orisoni.

Main article: Niacal

Thissioni

Thissioni is the first planet orbiting the star Orisoni.

Main article: Thissioni