Note: For all map points of nameds in The Grounds (for "housegarden.txt" map files), see this quest entry.
Zonoraz is one of two named bixies that appear in the bixie fort. She appears along the south wall (one non-roaming, one roaming PH) and hits for a max ~9,300.
WARNING: Keep your DPS low. The faster she loses health, the more frequently she casts her "Soothing Pollen" effect (AE for 27,000 dmg).