You could use a Scatter Brush.
First draw a single "hair".
Then draw a rectangle around the hair. Realize that the center of the rectangle is going to be the center of the brush path. So, you want the rectangle to be off-center to allow the "hair" to align to the path the brush will sit on. In the image below I've made the rectangle magenta just so you can see it. But when you create your rectangle, you want it to have no fill, no stroke, and be behind all other artwork. So once you draw the rectangle move it to the back.
Then select the "hair" and the rectangle and drag them both to the Brush Panel.
When asked, choose Scatter Brush and click
OK. A second dialog window will open. Make certain you set the brush relative to the path. The other options you can tweak a little if you'd like, but you'll adjust these later as well.
Then add a new stroke to your object and click the brush you just made.
Typically the brush isn't going to suit the artwork right off, you'll need to adjust it. (I drew my "hair" much, much larger than I would if I really intended to use it.) So just double-click the brush in the Brush Panel and adjust the settings. Be certain to tick the
At this point it's all about what you want the image to look like.
When you're done click
OK and choose to "apply to strokes" to update the brushes that have been applied in the artwork to these settings.
Then, if you need to remove some "hair" or otherwise alter it, you can use
Object > Expand Appearance and
Object > Expand to turn the "hair" into individual objects.
Note how some of my "hair" actually crosses the base path and sits inside the figure. This is because my rectangle was (purposefully) not perfectly centered in the scatter brush artwork. Or, in other words, I made certain the hair artwork went past the center point of the rectangle. This causes the art to go past the baseline (spine) the brush is applied to. If you want your hair to site exactly on the base path, you need to ensure the artwork does not cross the center of that rectangle while touching the center.