Shizuka is a new unit introduced in Metal Slug Attack.
She values bravery and honor, as she worked for Abul because he did not attempt to run away even when she threatened him. She also acts as a voice of reason, as Abul often performs reckless actions which result in his failures. While she still works for Abul, her view of him seems to have faded significantly and she is only staying for the pay.
Her MSA description states that she is fond of sweets, and that during her free time, she takes out her smartphone to look up new sweets.
First appearing in the Extra Ops "Silent Assassin", Abul Abbas rendezvouses with her. To determine if she should work for him, Shizuka threatens him and even cuts some of his beard off with her kunai. Impressed with his bravery, she decides to work for him. She is tasked with destroying the Toschka Dalanue II outside his territory, and successfully does so.
In the Extra Ops "Dancing Brave", she informs him of a partially constructed Ptolemaic Union 03 unit. Abul initially tries to send her to destroy the machine, but is interrupted by Aisha, who volunteers. Shizuka dislikes Aisha due to her appearance and her supposed inexperience in battle. Abul allows Aisha to go, while he discusses secret material with her. Upon Aisha's return, she and Abul are bewildered by Aisha's behavior.
First appearing in the story "Cloak of Darkness", she advises Abul against spreading his lines thin to allow the Regular Army to defeat them. Abul lends her a few soldiers while she checks the traps in the event that any other army is aware of their fighting, and finds that one of them has been triggered. She later learns of Yoshino and reluctantly retreats with Abul when he unexpectedly returns from the battlefield.
In "Arabian Romance", Aisha gets a meltdown after seeing that Abul is spending more time with Shizuka instead of her. After Cleopatra helps Aisha learn about romance, she uses what she learns to ease her obsession over Abul. Shizuka also begins to train Aisha, admitting that despite Aisha's obvious hatred of her, she is willing to learn off her. When Abul comes in, she playfully teases her, prompting Abul to wonder when they got along so well.