Pirka Riyannis, née Saroyn, was a female Trill who lived during the late 24th century. She was the fourth host of the Riyannis symbiont.

Pirka Riyannis was a folk musician who played the bass fife, and was reasonably well-known on the Trill planetary internet despite primarily playing for her own enjoyment. She had several daughters.

Pirka was declared clinically dead after an aircar crash in the 2390s, and the symbiont was transferred to Birail Izer.

When Birail Riyannis conducted her zhian'tara in 2410, Pirka's identity was placed into Tesjha Phohl. Pirka complained that her fife music didn't sound right to her current Andorian ears, and spoke approvingly of a recording of Dul'krah, Clan Korekh's rendition of "Tirk's Lover" by Korin Sera. She also advised Birail that she'd have to make a difficult choice regarding her Starfleet career if she fell in love. (Bait and Switch: "Tinker, Golfer, Doctor, Trill")

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