Keel

Kiel was first introduced in chapter 131 of the web novel as a slave owned by the Slave Trader in Melromarc's Castle Town. He is described as a young man around the age of 10 with dog-like features. When Naofumi tells Raphtalia to choose anyone he recognizes from her village and Kiel is the first. At first he doesn't recognize her because of her grown up appearance, but when she recounts the time he was looking for a pretty shell to give "Father" for his birthday so he dived into the ocean and almost drowned but was saved by Sadina] as well as the time he accidentally ate a poison mushroom he found in the field, messed up her stomach, and hid to avoid being scolded so when she, [[Raphtalia, found him she was told to keep it a secret including that he had even wet his pants. After all was said he immediately acknowledged who she was. After having an unconvincing conversation with Raphtalia, Kiel agrees to become Naofumi's slave with the hope of returning to the village. Although she identifies as male, in chapter 137 it is revealed that he is actually a she. She rebuts with "father said that a man is a man if he thinks he is a man no matter what" but the revelation still throws her into moderate confusion. Kiel wasn’t meant to be an important character, however the personality she was given overlapped with another male character that was already firmly planned to be made down the road, so the author decided to give ‘him’ a little "quirk". She is presumed to be future wife of Foulu as well as the "Guardian of Divine (crepe) Tree" in the Christmas Special.

Appearance
She is initially described as a young man around the age of 10 with dog-like features, however as she levels and her appearance ages as well as her being verified to be female she is made out to be more of a tomboy who could easily pass as a pretty boy.

Chronology
Purchased slave, Raphtalia explains what's up. c131

He thought he was a boy but turns out he's a girl. c137

Gives Naofumi shit about him sounding all rapey when explaining the difference between men and women. c138

Begins pedaling with Naofumi and Raphtalia and she receives a set of masculine armor for possible future battles as well as a cute one piece to help boost sells. c139

She, Taniko, and the mass of other slaves are found to be hoarding monster eggs they found while training. She and Taniko begg Naofumi to allow the village to keep them and he agrees. c143

While training with fellow slaves Kiel acts a bit too reckless and gets hit by an attack from behind. Luckily, Raphtalia realized and was able to save them, but from that experience, Kiel and many of the other slaves became more cautions when fighting and started formulating battle formations and strategies. They also began to respect Naofumi more for protecting them like he usually does. When he is able to class up he chooses to follow the same path as Raphtalia and Firo, using Firo's ahoge to gain superior stats in almost every field when compared to other class up choices, because she wants to become as strong as she can possibly be even if it forfeits her choice in the direction of her class up. c144

When she classed up, a smoke screen came out and covered the area and Kiel's stats rose significantly although they were slightly lower than Raphtalia and Firo's from when they classed up. c145

Sickle Skills

 * Soul Ripper (ソウルリッパー)

Heroes

 * Iwatani Naofumi

Other

 * Foulu