Undergirls

The Undergirls (アンダーガールズ, or Under Girls) are an special group/team of girls that, since the term was included in the 1st Senbatsu Election, take charge of the main B-side of most of the AKB48 Singles and recently also SKE48, SDN48, NMB48, JKT48, OHI48, BNK48 and MNL48 Singles.
==History==
The Undergirls were introduced in the 1st Senbatsu Election, where the girls that ranked from 22# to 30# were given the chance to sing the B-side track of the single (Iiwake Maybe) that the Senbatsu elected (21#~1#) were going to sing.
Previous to this, all the original B-sides were also done by the Senbatsu of that single, what now gave the chance to a lot of other girls to actually take part of a single release (with most of the them doing it for the first time).
The first Undergirls generation, consisted of 9 girls and sung the track Tobenai Agehachou, which also got a PV, marking the first time an AKB48 B-Side got a Music Clip.
Later on for the next single RIVER (that also introduced the Theater Girls), the Undergirls concept was used again. With the difference that this time, the manager decided the members making an almost completely different selection of girls compared to the first generation.
The Undergirls weren't used in the following single (Sakura no Shiori) and made a comeback in Ponytail to Shushu, being used in all singles until GIVE ME FIVE!, when Undergirls were replaced by Special Girls, to then return on Gingham Check.
The Undergirls concept is not used on Janken singles, such as Chance no Junban and Ue Kara Mariko. On Kaze wa Fuiteiru, the Undergirls were divided on three groups: Undergirls, Undergirls Baragumi and Undergirls Yurigumi.
===Undergirls on SKE48===
For SKE48's 3rd Single Gomen ne, SUMMER, the Undergirls concept was implemented with SKE48 for the first and only time.
In difference with AKB, 2 different groups of Undergirls were used in the same single (Undergirls A and Undergirls B). Both groups featured an small group of girls and different songs Undergirls A was an Exclusive-track and Music Video of Type-A as Undergirls B were of Type-B.
===Undergirls on SDN48===
SDN48 started using the Undergirls concept since the their first single, also implementing the Undergirls A/Undergirls B concept SKE48 started.
===Undergirls on NMB48===
NMB48 started using the Undergirls concept on Junjou U-19. Unlike AKB48, SKE48, SDN48 and Nogizaka46, their Undergirls don't have a PV.
===Undergirls of JKT48===
JKT48 started using the Undergirls concept in Flying Get (Hanikami Lollipop).
===Undergirls of OHI48===
OHI48 started using the Undergirls concept in Flying Get (Hanikami Lollypop)
===Undergirls of BNK48===
BNK48 started using the Undergirls concept in Koisuru Fortune Cookie (Skirt, Hirari).
===Undergirls of MNL48===
MNL48 started using the Undergirls concept in Kimi wa Melody (Gingham Check).
===Undergirls of CGM48===
CGM48 started using the Undergirls concept in Melon Juice (Otona e no Michi).
===Undergirls on Nogizaka46===
Nogizaka46 started using the Undergirls concept on Guru Guru Curtain. The Undergirls, also known as Under Members, have a B-Side on one of the single types, including a PV.
==Undergirls Generations (OHI48)==
====1st Generation====
Hanakami Lollypop (Flying Get) (16 members(17#-32#))
* Team O: Felicia Giselle(25#), Helena Angelica Christy Jones(20#), Raquel Kai Maika(28#)
* Team HIII: Ava Laura Milwise(24#), Eva Marie Elizabet(17#), Mayora Yegar(30#), Olivia Tiennot(29#), Sasha Varnada Marlsa(19#), Sofia Vaatu Wan(18#)
* Trainee: Asta Calista(26#), Bayley Cornass Martinez(21#), Brie Cameron Loshwa(31#), Caitlyn Payton Gwyneth(32#), Cassandra Mionet Rose Lee Anne Elizabeth McKay(23#), Michelle Abigail(22#), Rebecca Von Melaski(27#)
==== 2nd Generation ====
Hito no Chikara (Everyday, Kachuusha) (16 members(17#-32#))
* Team O: Alicia Martha(25#), Felicia Giselle(30#), Gracia Naomi McCarthy(17#), Helena Angelica Christy Jones(19#), Luna Musana(22#), Madison Kaylix(31#), Veronica Margareth(23#).
* Team HIII: Charlotte Elizabeth Kamley(32#), Ivory Abigail Ruth(29#), Sasha Varnada Marlsa(20#), Sophia Viela Wan(21#), Sofia Vaatu Wan(18#), Vienny Firilya(26#).
* Team I: Carolina Emilia(24#), Rebecca Von Melaski(27#), Violet Parker Mailid(28#).
==== 3rd Generation ====
Nante Bohemian (Mariposa Dream) (16 members(17#-32#))
* Team O: Alicia Martha(#27), Felicia Giselle(#23), Helena Angelica Christy Jones(#17), Veronica Margareth(#21)
* Team HIII: Eva Marie Elizabet(#18), Ivory Abigail Ruth(#20), Mayora Yegar(#30), Olivia Tiennot(#19), Siobhan Bernadette Finneras Thompson(#24), Vienny Firilya(#26)
* Team I: Anne Marie(#32), Asta Calista(#29), Carolina Emilia(#22), Michelle Abigail(#28)
* Team US: Gabriella Reina(#25), Lucy Edwin Jones(#31)
=== 4th Generation ===
Bara no Kajitsu (Kimi wa Melody) (16 members(17#-32#))
* Team O: Alicia Martha, Bianca Morgan Hayter, Carolina Emilia, Roxanne Georgina, Violet Parker Mailid.
* Team HIII: Asta Calista, Siobhan Bernadette Finneras Thompson, Veronica Margareth, Vienny Firilya.
* Team I: Isla Christi, Sophia Viela Wan.
* Team US:Keira Giselle Athalia, Sofia Vaatu Wan, Trinity Mendes.
* Team JII: Frida McNeil.
* JKV48 Trainee: Chyna Chapa.
=== 5th Generation ===
Express Train and Dynamic Vision (Kamonegix) (16 members(17#-32#))
* Team O: Anne Marie, Carolina Emilia, Lucy Edwin Jones.
* Team HIII: Alicia Martha, Anne Marie, Asta Calista.
* Team I: Eva Marie Elizabet, Felicia Giselle.
* Team US: Violet Parker Mailid.
* Team JII: Esmeralda O'reilly, Heidy Barnette, Mayra Reyes.
* Team SII: Adilene Godfrey, Deandra Frida Maxwell, Dora Paola Crosby.
=== 6th Generation ===
Dear my teacher (Teacher Teacher) (16 members(17#-32#))
=== 7th Generation ===
Zipper (Virginity) (16 members(17#-32#))
=== 8th Generation ===
(Borealis) (16 members(17#-32#))
=== 9th Generation ===
(Always Looking Straight Ahead) (16 members(17#-32#))