Who am I? - A struggle for self-identity
From a young age, treated as a tool by everyone but Gilbert. Violet begins her life in the army as a killing machine, diminishing the value of the lives of others and her own. This is what begs the question, 'Who am I?'

Taking on the job of an 'Auto Memory Doll', she is sent to clients wherever they may be to help them write a letter, portraying their emotions into words. But how can you portray emotions when you don't know how to feel them yourself? She struggles to understand basic feelings: love, sadness, happiness, and others. More importantly, there is a barrier between her and experiencing love freely. She can feel the tingles of love, and she can feel the hurt, but she could never grasp it in the way Gilbert could for her.
"Even the burns that may seem to have faded have left a mark deep down."
We don't always notice the scars and wounds on our bodies, even more so when they're ones in your mind. But to change what hurts, it takes acceptance. If you don't refuse to see your body burning, how could you do anything to stop it?

It can hurt so much not knowing who you are taking a different way is easier. But there will always be someone there looking out for you. People are kind and people love you.
I think it is this understanding towards the later episodes that Violet breaks free of feeling the need to be ordered around; she no longer requires someone holding her leash and telling her what to do because she found the value of life. She found that repressing your emotions and holding onto what cannot come back will only hurt. She also becomes a person that can no longer kill; realising every life is important, she is able to sacrifice herself for someone other than Gilbert.

Losing your arms, losing your master, losing orders could have been the end of her. But by allowing herself to be guided by the world around her, she reconnected with her strong emotions about the war, and about losing someone dear to her heart. The pain doesn't end, but you can live on.
"No matter how far away they are, loved ones will always watch over you."
The space from loss is empty, and you can feel lonely. But through this, you can find a new identity, or rediscover who you were. You can reconnect to the past, and explore a new future.
Through losing Gilbert, Violet recognizes she loves him back and learns the answer to the question, 'Who am I?'

What are letters? - Through letters bring connection
In the show, what brings everything together, the glue that conveys love, is a letter. Often when we talk to others, words are stuck in our throats, we struggle to communicate how we feel about a person to their face. In modern life, texts can often be a substitute for saying heartfelt things because it feels embarrassing to say things directly.

Violet found herself because she tried, again and again to find out, "What is love?" In the hustle and bustle of everyday life, many can forget what love is. It is through writing letters, or trying to, over and over until you can that she begun her journey into finding her identity. With all of her clients, she realises she has feelings. Why else would she cry? Shake with emotion? Even if you don't understand it, even if you don't feel it, we are all capable of love. We want to love someone who loves us just as much.
"No letter that could be sent deserves to go undelivered."
I never thought about what postmen did. They take our hopes, dreams, promises, our love and they travel all over to find the recipient. They take all that we feel for a person and give it to them. Postmen are the unsung heroes of our affections. They deliver us closer to who we want.

Everyone has a letter they want to write. To the one they love, to those they have lost, to those they want to meet, to themselves. I found it beautiful to see all the letters raining down from the sky. Begin writing a letter about all those things you've never said that you wanted to, and release it, connect yourself to everyone you wanted to say something to.