Chrono Wiki
Type Summon
Color Green
Allocation Level 7±2
Target All Enemies
User Innate green only
Trappable Yes
Description Summons a forest dryad to sprinkle poison dust. Inflicts Poison.

Sonja is a 7th-level Green Element from

Sonja can be captured using a trap element in monster Prey Mantis found on the island Gaea's Navel, when Serge's Party goes in search for the Green Dragon.

Can be trapped from PreyMantis (Gaea's Navel). They must be in a group of 2 at the start of the battle. Or from Bulb (Shadow Forest, Home World). It must be alone. Or from boss Anemotor (Terra Tower).