{{CharTab}}
<div style="border:3px dotted red;text-align:center;margin-bottom:10px"><span style="color:#FF0000">'''Formerly the youngest chief researcher at the [REDACTED] Wing, this Sinner possesses higher intelligence compared to most others. We estimate that everyday conversation with this Sinner will prove difficult for managers selected by our current screening process. Avoiding communication altogether will pose a risk on its own, however. If the Sinner remains silent for a long time, that means he is currently processing a line of deliberate thought; we recommend waiting patiently for him.'''</span></div>
{{SinnerInfo
|theme=yisang
|title=Yi Sang
|image=YiSangArt.png
|color={{Color box|2|#d4e1e8|(Dreamy Gray)}}
|affiliation=[[Limbus Company]] <br> [[League of Nine Littérateurs]] (Former) <br> [[New League of Nine Littérateurs]] (Former)
|gender=Male
|height=175cm, 5'9"<ref>[[:File:E703 1.png|LCB Regular Check-up CG]] and [[:File:Yi Sang ID Photo 3.png|Yi Sang ID photo]].</ref>
|birthday=January 1st<ref>[[:File:Yi Sang ID Card 2.png|ID card released with the April 30th, 2025 update]] states his birthday is "1.1.(censored)".</ref>
|district=District 19, [[S Corp.]]
|relations=[[LCB]] (Colleagues) <br> [[League of Nine Littérateurs|League of Nine]] (Former Compatriots) <BR> [[Sang Yi]] (Mirror Self)
|source=[[wikipedia:The_Wings_(novel)|The Wings]]
|nationality=Korean {{Nationality Flag|Flag of South Korea|20}}
|voiceactor=Min Seung-woo
|subtitle=Yi Sang Signature Small.png
}}
<div style="padding-bottom:10px;"><div class="floatleft" style="padding-right:15px;">[[File:Yi Sang Icon.png|framelss|x100px]]</div><span style="color:#d4e1e8;text-shadow: 2px 2px 0px rgba(0,0,0,0.6);font-size:18px;"><div style="display:flex;flex-direction:column;max-height:100px"><div style="text-align:left;justify-content:flex-start">‘박제가 되어버린 '''천재'''’를 아시오?</div><div style="height:100px"> </div><div style="text-align:right;justify-content:flex-end"> ''"Have you heard of the taxidermied '''genius'''?"''<small><sup>{{cite|[https://youtu.be/HsffQ_RfOYQ <nowiki>[ Limbus Company ]</nowiki> Yi Sang Character Promo]}}</sup></small></div></div></span></div>
'''Yi Sang''' (Hangul: 이상, ''i-sang'') is designated '''Sinner #1''' of Limbus Company's LCB department.

Yi Sang is a cryptic and mellow man with a lot of thoughtfulness to him. He was a researcher and architect previously affiliated with the [[League of Nine Littérateurs]], having invented the [[Mirror]] as a [[TimeTrack|T Corp.]] researcher prior to joining Limbus Company.