These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: The Fosters
Tear Jerker: the end of "The Honeymoon," with Callie intentionally shoplifting food from a convenience store in order to get arrested. The utter lack of hope in her eyes as she eats a candy bar while crying is devastating
The Woobie: Callie and Jude, especially as we learn more about their backstory. Jesus and Mariana to an extent, though they've mostly grown past the stage in their life where they're as vulnerable.
Jerk Ass Woobie: Becka, one of the other girls at Girls United, is the most consistently antagonistic, particularly towards Cole, who she feels is just begging for attention (rather than being trans). However, she like all the other girls has a tragic backstory, and one of the webisodes reveals she's been cutting herself
Gabby, another of the Girls United girls, is also abrasive and liable to make cruel remarks (although she's less transphobic than Becka). She also has an abusive father, a bad past involving being in a gang, and as the webisodes reveal she's HIV positive