| Sawai Natsuha沢井 夏葉B |
| Aliases | Nacchan, なっちゃん |
| Measurements | Height: 130cm, Weight: 32kg, Bust-Waist-Hips: 63-46-65cm |
| Birthday | 9 July |
| Hair | Braid, Brown, Parted in Middle, Shoulder-length, Spiky Bangs, Straight, Twin Braids, Twin Tails, Waist Length+ |
| Eyes | Blue, Tareme |
| Body | Flat Chest, Kid, Older Appearance, Pale, Short (obsolete), Slim, Tanline, Teen |
| Clothes | Apron, Bikini, Blouse, Bracelet, Dress, Evening Gloves, Garter Belt Stockings, Gloves, Hair Ribbon, Hair Tie, Hairpin, Hat, Hoodie, Kemonomimi Hat, Kemonomimi Headband, Knee-high Socks, Lab Coat, Leggings, Lolita, Maid's Dress, Maid's Headdress, Pajamas, Pendant Necklace, Rain Coat, Ribbon Hair Tie, Ring, Rubber Band With Beads, Sandals, School Swimsuit, School Uniform, Shimapan, Shirt, Shorts, Skirt, Sports Shoes, Straw Hat, T-shirt, Tail, Thigh-high Stockings, Traditional Bloomers, Watch, Wedding Dress, Wedding Ring, Wristband, Yukata |
| Personality | Brother Complex, Curious, Energetic, Ignorant, Immature, Kind, Loud, Naive, Nature Lover, Optimist, Outgoing, Proactive, Talkative, Third Person |
| Role | Daughter, Elementary School Student, Friend, Full Sister, Orphan, Younger Sister |
| Engages in | Cleaning, Cooking, Cosplay, Cycling, Investigation, Moving, Religion, Swimming, Teasing |
| Subject of | Accident, Bridal Carry, Clinical Depression, Curse, Fainting, Hospitalization, Illness, Necrophobia, Nightmares, Physical Age Reversion, Piggyback Ride |
| Visual novels | Main character - Monobeno
Main character - Monobeno -Happy End-
Maitetsu
> Makes an appearance - r53923:Maitetsu Remaster
Main character - Ayakashi Kyoushuutan |
| Voiced by | Anzu Mitsu |
DescriptionTooru's younger sister. <hidden by spoiler settings>. |