diff --git a/CHANGELOG.md b/CHANGELOG.md
index 20f0a6b..2e340e3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@
 + Add more exceptions: `NotFoundError()`, `BabelTowerError()`
 + Add `sass` module
 + Add `quart` module with `negotiate()`, `add_rest()`, `add_i18n()`, `WantsContentType`
++ Add `dei` module: it implements a compact and standardized representation for pronouns, inspired by the one in use at PronounDB
 
 ## 0.4.0
 
diff --git a/src/suou/dei.py b/src/suou/dei.py
new file mode 100644
index 0000000..c485216
--- /dev/null
+++ b/src/suou/dei.py
@@ -0,0 +1,110 @@
+"""
+Utilities for Diversity, Equity, Inclusion.
+
+This implements a cool compact representation for pronouns, inspired by the one in use at <https://pronoundb.org/>
+
+---
+
+Copyright (c) 2025 Sakuragasaki46.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+See LICENSE for the specific language governing permissions and
+limitations under the License.
+
+This software is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+"""
+
+
+from __future__ import annotations
+
+
+BRICKS = '@abcdefghijklmnopqrstuvwxyz+?-\'/'
+"""
+Legend:
+a through z, ' (apostrophe) and - (hyphen/dash) mean what they mean.
+? is an unknown symbol or non-ASCII/non-alphabetic character.
++ is a suffix separator (like / but allows for a more compact notation).
+/ is the separator.
+
+Except for the presets (see Pronoun.PRESETS below), pronouns expand to the
+given notation: e.g. ae+r is ae/aer.
+"""
+
+class Pronoun(int):
+    """
+    Implementation of pronouns in a compact style.
+    A pronoun is first normalized, then furtherly compressed by turning it
+    into an integer (see Pronoun.from_short()).
+
+    Subclass of int, ideal for databases. Short form is recommended in
+    transfer (e.g. if writing a REST).
+    """
+    PRESETS = {
+        'hh': 'he/him',
+        'sh': 'she/her',
+        'tt': 'they/them',
+        'ii': 'it/its',
+        'hs': 'he/she',
+        'ht': 'he/they',
+        'hi': 'he/it',
+        'shh': 'she/he',
+        'st': 'she/they',
+        'si': 'she/it',
+        'th': 'they/he',
+        'ts': 'they/she',
+        'ti': 'they/it',
+    }
+
+    UNSPECIFIED = 0
+
+    ## presets from PronounDB
+    ## DO NOT TOUCH the values unless you know their exact correspondence!!
+    ## hint: Pronoun.from_short()
+    HE = HE_HIM = 264
+    SHE = SHE_HER = 275
+    THEY = THEY_THEM = 660
+    IT = IT_ITS = 297
+    HE_SHE = 616
+    HE_THEY = 648
+    HE_IT = 296
+    SHE_HE = 8467
+    SHE_THEY = 657
+    SHE_IT = 307
+    THEY_HE = 276
+    THEY_SHE = 628
+    THEY_IT = 308
+    ANY = 26049
+    OTHER = 19047055
+    ASK = 11873
+    AVOID = NAME_ONLY = 4505281
+
+    def short(self) -> str:
+        i = self
+        s = ''
+        while i > 0:
+            s += BRICKS[i % 32]
+            i >>= 5
+        return s
+    
+    def full(self):
+        s = self.short()
+
+        if s in self.PRESETS:
+            return self.PRESETS[s]
+        
+        if '+' in s:
+            s1, s2 = s.rsplit('+')
+            s = s1 + '/' + s1 + s2
+
+        return s
+    __str__ = full
+
+    @classmethod
+    def from_short(self, s: str) -> Pronoun:
+        i = 0
+        for j, ch in enumerate(s):
+            i += BRICKS.index(ch) << (5 * j)
+        return Pronoun(i)
+