Basically your titan is called the scythe titan. Similar to Annie's titan form. With your handening ability you can created hardened scythes from your elbows to your wrists. Kinda imagine the war hammer titan but with a scythe and a female body.
Marcel and Porco are your elder brother, Annie is your best friend. You don't really like Reiner much because you think he's a loser (like Porco does).
Y/n - your name
H/l - hair length
H/c - hair colour