Drama anime heavily emphasize their characters' emotional development. Whether by experiencing the protagonist’s emotional turmoil, viewing heated character interactions, or exploring a passionate romance, any anime that humanizes its characters through emphasizing their flaws qualifies as a Drama.
Mecha are self-propelling machines that are modeled after humans; some can change into multiple, non-humanoid formats as well. They're usually controlled by an internal pilot or by remote, but are sometimes sentient beings that move autonomously. A mecha's size ranges from bulky, wearable armor to a massive, towering contraption and beyond. While mecha have a wide range of applications, such as making manual labor easier, they are most commonly portrayed as heavily-armed war machines.
These anime showcase the joys and hardships of falling in love, whether a schoolgirl has an unrequited crush on her senpai, a Love Triangle occurs within a group of friends, or rivals become lovers through competition or their intense passion for each other.