Arukenimon is one of the major villains in the latter half of Digimon Adventure 02. She usually appears in the form of a woman wearing a red sleeveless dress, a short red cape with a cowl, long purple gloves with a dark webbing pattern around the elbows and a golden spider-like design on the back of the hands, a purple belt, and odd purple boots with grey soles. She also wears a tall striped red and purple sunhat with a red rim including a webbing pattern, which is adorned with a golden spider shaped brooch with a pink gem in the middle, and large dark purple shades with golden rims which conceal her eyes. When in battle, she shifts to her Digimon form. It is unknown whether her ability to shift between Digimon form and human form is a side effect of her being half Digimon-half human or because of her species' natural abilities.
Arukenimon is an arrogant and proud Digimon. She treats those she believes are beneath her with disrespect and contempt. She is intelligent, mission-focused and very dangerous, though she is impulsive and prone to fits of anger over very petty concerns, like getting split ends in her hair or her partner saying something stupid.
Arukenimon takes over when Ken Ichijouji sheds his Digimon Emperor persona following the destruction of Kimeramon. She initially appears in her human form, confusing the children as to why an adult is able to enter the Digital World. When fighting the DigiDestined, she uses her Spirit Needle to turn Control Spires into Digimon.
In one event in the Giga House, she uses a flute to control the resident insect Digimon until the flute's powers were negated. After her flute's powers failed, she decides to take drastic measures and shifts to her Digimon form. She fights the children and proves to be a formidable foe, but is defeated by Paildramon. Fortunately Mummymon, her partner, comes to her rescue. Following the failure at the Giga House, she works alongside Mummymon. Although Mummymon is in love with her, the relationship is not particularly romantic, as Arukenimon is arrogant and rejects any advances by Mummymon. Still, after the event at the Giga House, it is rare to see them apart.
To get back at the children, Arukenimon creates BlackWarGreymon using one hundred Control Spires, but he doesn't obey her due to the complexities of his creation. Following Mummymon's suggestion, Arukenimon decides to try and destroy the Destiny Stones to throw off the balance of the Digital World. Mummymon and her artificial Knightmon's attacks on the first Stone cause BlackWarGreymon to attack the Stone and destroy it himself. Satisfied, Arukenimon sits back and watches as BlackWarGreymon destroys the rest of the stones, occasionally attacking the DigiDestined to keep them from disrupting BlackWarGreymon's assaults. The plan ultimately fails, however, as the DigiDestined release Azulongmon from his prison during the fight to protect the last Destiny Stone, and he restores all the stones with seeds of light.
Following this, Arukenimon and Mummymon turn to Yukio Oikawa, their master, and he instructs Arukenimon to open the Digital Gates in the entire world. During Christmas day, while the Japanese DigiDestined travel around the world and help close the gates, Arukenimon and Mummymon drive around Tokyo in a truck and kidnap twenty children. The following day, they kidnap Ken as well, so that Oikawa could scan his Dark Spore and pass it on to the children.
After this, Oikawa, Arukenimon and Mummymon run off to hide in a vacation house in the mountains, but BlackWarGreymon comes from the Digital World to destroy them. As BlackWarGreymon asks Arukenimon and Mummymon where they came from, Oikawa reveals that he created Arukenimon and Mummymon from a combination of his own DNA and data, making them both half Digimon, half human.While the revelation clearly shocks and troubles Arukenimon and Mummymon, who were not aware of this fact, Arukenimon prefers not to discuss it and focus their efforts on tracking the seeded children and protecting Oikawa as they hide back in his run-down apartment in Tokyo.
When Oikawa opens a gate using the seeded children's power, they end up in the world of dreams, where it is revealed that Myotismon had been possessing Oikawa. After he harvests the Dark Flowers and becomes MaloMyotismon, he turns his sights on his own surprised henchmen, torturing and killing Arukenimon with the excuse of testing his newfound power.
Arukenimon makes an appearance as a boss in two chapters of Digimon Tamers: Digimon Medley.
- Spider Thread: Chops up the opponent with razor-sharp wires.
- Acid Mist: Sprays green acid from its mouth.
- Spirit Needle: Plucks strands of its human form's hair and uses them to convert Control Spires into artificial Digimon. Using more strands of hair will create stronger Digimon; one for a Champion, ten for an Ultimate, and one hundred for a Mega.