— Chlammy, Rule Number 10
Chlammy Zell (クラミー・ツェル, Kuramī Tseru) is a human who allied herself with the Elves to try and win the king's contest, due to her belief that humans will never be strong enough and must depend on others to survive. She is the friend of the Elf girl Fiel Nirvalen, despite being a slave of Fiel's family.
After Sora bet the Race Piece of Immanity in their game with the Eastern Union, Chlammy Zell challenged Sora in an attempt to win the Race Piece. However, Sora, as he was challenged and thus had the right to choose the game, chose a game in which they would both bet everything they have in parts, tricked her into sharing his memories with her in a game of Othello. After Sora won the game, he returned all memories to the respective owners. After Chlammy had seen Sora's memories, she decided to go along with him and his plan.
She is a descendant of Nonna Zell, one of the surviving Immanity of the Great War. According to the Gaiden chapter "One Pair or Heart Straight Flush", her family have been slaves to the Nirvalen family since her great-grandfather's generation, presumably after losing a game.
Chlammy Zell is a short and slender girl with purple hair, and wears a black veil draped over her head most of the time. She is rather lacking in the chest department, which is something that bothers her a lot.
She holds a mostly emotionless and confident expression during the beginning of the story, but that's nothing but a facade. She would easily be reduced into a blubbering mess when being scared, or when things weren't going her way. Despite this, she is still very determined in pursuing her cause.
When Sora yelled at her for underestimating the human race, she threw away her confident facade and broke down in tears while childishly calling Sora names and blaming him. When she had a rematch with Sora, she still acted pessimistic about the possibilities of the Immanity. After being defeated again and having her memories restored, she gained a new found respect for Sora and the Immanity. They parted ways on good terms as she agreed to help defeat the Werebeasts and unite the other races.
While initially finding Sora as a cocky, all-around lazy, and hurtful person, she changed her thinking upon seeing his memories. In Episode 12, she admired how Sora managed to accomplish all his goals without spilling a single drop of blood and staying true to himself despite all the odds.
She is very insecure about her modest busts, and would fly into rage if anyone so much as to mention or imply it. She would fake her busts with Fiel's magic in the baths, wear paddings under her clothes, and issue death threats towards the vendor who sold her bust enhancer drugs that only lasts for a day. When her breasts are enlarged by Veig Drauvnil's reality-warping Spirit Arms, she was so overcame with joy that she would crawl on fours just to see her new found cleavage.
She coordinates well with her friend, Fiel, allowing her to sneak Elf magic into games intricately enough that it can be hard to detect the source, even for those capable of sensing magic (as in the case in Volume 5 Prologue against Ron Barthel).
She also had the initiative to take the crown and helping Immanity to stand before Sora and Shiro came to Disboard. She was able to think through how the Elves were able to protect Immanity from the different races and attempted to take the crown from the gambling competition.
During the events of Volume 5, it is shown that she has become much more capable in both games and psychological manipulation, that she's able to dominate Ron Barthel in the Oracle Card game and foil all his plans together with Fiel. According to Fiel, she had been tirelessly learning Sora's strategies and tactics from his memory acquired during the Existence Othello game.
She greatly underestimated Immanity, thus also underestimating her abilities. Since her encounter with Sora, however, she learned to have more faith in the wisdom of humanity. Although she may still believe Immanity is at a disadvantage to the other races, she learned that Immanity can cope with it through other methods and has since been studying ways to overcome Elven magic, despite Immanity being unable to even detect it much less use it.
- According to BD Special #5, her cup size is A, and the reason being Fiel magically suppressing the growth of her busts. She was totally exasperated when she heard this.