Sister Suvi are a strange meeting of three very different minds. Strangest of the three is Merrill Garbus (tUnE-YaRds), whose swooping voice and arch ukulele make her sound like she just escaped from the circus. Drummer Nico Dann is her opposite: a fiendishly precise percussionist with jazzbo credentials, Dann is as straight and unflappable as a Hal Hartley leading man. And Patrick Gregoire (also of Islands), a self-described indie rock guy with a moaning tenor, is the fulcrum. I first caught Sister Suvi on a bill with Canadian compatriots Shapes and Sizes, who are another eclectic and free-thinking band with an engaging female lead beside a stolid male. But Sister Suvi rightly took the headlining spot: where that band has found its style in fits and starts, Sister Suvi jumped in up to their chin.