streak

'Twas early June, the new grass was flourishing everywheres, the posies in the yard—peonies and such—in full bloom, the sun was shining, and the water of the bay was blue, with light green streaks where the shoal showed.

I hope I can keep up this streak of accomplishments.

Streak (moth) on Wikipedia.Wikipedia

She's a quiet, bookish person, but she has a rebellious streak.