|Name in Japanese||峰理子|
|Romaji Translation||Mine Riko|
|Debut (Anime)||Episode 01|
|Debut (Light Novel)||Volume 01 (2nd Ammo)|
|Appears in||Anime, Light Novels, Manga|
|Voice Actor (Japanese)||Mariya Ise|
|Voice Actor (English)||Luci Christian|
|Birthday||March 31, 1993|
|Height||147 cm (4'10")|
|Weight||43 kg (96 lbs)|
|Nationality||1/4 French, 3/4 Japanese|
|Skill Rank||Rank A|
|Title (s)|| Butei Killer|
Walther P99 Pistol (Two)
Arsene Lupin the 3rd (Father)
|“|| I'm not gonna forgive you if you are killed by someone other than me!
–Riko Mine Lupin the 4th (峰 理子 Mine Riko)
Riko is very short, around the same height as Aria at 147 cm (4'10"). She has long, blonde hair that falls below her waist and has twin tails styled on the side of her head. Despite having an overall appearance similar to Aria's, Riko's bust is considerably larger than Aria's (much to Aria's jealousy).
Her regular clothing is a typical Butei uniform modified to a gothic lolita style. Outside of campus, she enjoys cosplaying as maids, cats, ecetera.
Typically, she is a rather scatter-brained and playful. She loves giving nicknames to others (Kinji as Ki-kun, Reki as Rekyu, etc.). She is also one of the few people who knows Kinji's secret, resulting in her love of sexually teasing him in order to activate it. Riko also has a fondness for fancy clothing, especially that of Gothic lolita. She's also a major otaku and loves playing dating sim video games to the point where she regularly attends comikets and often puts things into dating sim terms.
During tough situations, however, she breaks this facade. Kinji calls this side of her personality "Dark Riko". With the facade removed she uses rough language, her eyes emit an intimidating glare and she refers to Aria as Holmes (French: Olmes) instead of Aria. Her typically elegant fighting style becomes vicious and her bloodlust spikes tremendously.
Born to Arsene Lupin III and (presumably) Fujiko Mine, Riko showed promise in her learning parent's craft but didn't quite inherit their full capabilities. As a result, she was often treated with care from her maids due to her newfound role of producing a Lupin who did inherit her family's talent - something she would come to resent her entire life.
Around the age of 8, however, her parents would die in a car crash and, the mysterious Vlad took her in by pretending to be her relative. He would lock her up in an underground dungeon in order to conduct various experiments for creating an ideal 5th Lupin in the name of IU. The poor conditions of her imprisonment would greatly dampen her natural grown, causing her to remain 147 cm (4'10").
Eventually, she negotiated her freedom from Vlad's captivity and became a member of IU. As the descendant of Sherlock Holmes was making a name for herself, Riko swore vengeance against her and made it her lifelong goal to slay Holmes in order to prove herself worthy of her family's name and legacy - if not superior.
- Riko's former amica and fellow otaku is Kirin Shima
- Riko parents, Arsene Lupin III and Fujiko Mine, are characters from the manga and anime series Lupin III
Mine Riko on the Heroes wiki.