Hiragana — ゔぁ

ゔ (the hiragana base for "v" sounds) is extremely rare even in its own right, and ゔぁ is almost never seen outside of phonetic teaching charts. The "v" sound is represented in everyday writing almost exclusively by its katakana form ヴァ (e.g. ヴァイオリン, violin) or simply approximated with the b-row (バイオリン).