diff --git a/animal_crossing.py b/animal_crossing.py
index a9e0108..75c938c 100644
--- a/animal_crossing.py
+++ b/animal_crossing.py
@@ -22,7 +22,7 @@ def stalk_market(cmd):
 - !stalks buy <value>: will add a new offer listed at <value> bells.
 - !stalks sell: will list all currently available sell offers.
 - !stalks sell <value>: will add a new offer listed at <value> bells.
-- !stalks trigger <value>: will ping you if a new offer is listed above <value> bells. 
+- !stalks trigger <value>: will ping you if a new offer is listed above <value> bells.
 		''') # noqa: E501
 		return
 
@@ -88,7 +88,7 @@ def _stalk_list_buy_prices(cmd):
 	current_time = datetime.datetime.now(datetime.timezone.utc)
 	sunday = _date_to_sunday(current_time)
 	cur = db.execute('''
-	SELECT username, expiration, price FROM price 
+	SELECT username, expiration, price FROM price
 	JOIN user ON user_id = user.id
 	WHERE week_local = ? AND week_index = 0
 	''', (str(sunday),))
@@ -182,7 +182,7 @@ def _stalk_check_sell_triggers(cmd, price, expires_in):
 	if triggers:
 		msg = ' '.join(['<@!%s>' % (x) for x in triggers])
 		msg += (': %s has reported a sell price of %s, above your configured trigger. Their offer will expire in %s.' %
-			(cmd.sender['username'], price, expires_in))
+			(cmd.sender['pretty_name'], price, expires_in))
 		cmd.reply(msg)
 
 def _stalk_list_sale_prices(cmd):
diff --git a/bot.py b/bot.py
index 84214f0..5605624 100644
--- a/bot.py
+++ b/bot.py
@@ -275,6 +275,9 @@ def handle_message_create(self, d):
 			if len(lines) == 2:
 				arg += '\n' + lines[1]
 			cmd = CommandEvent(d, arg, self)
+			cmd.sender['pretty_name'] = cmd.d['member']['nick'] or \
+										cmd.sender['global_name'] or \
+										cmd.sender['username']
 			handler(cmd)
 
 	def handle_interaction_create(self, d):
diff --git a/canned.py b/canned.py
index 1b9f43b..a8086c3 100644
--- a/canned.py
+++ b/canned.py
@@ -82,17 +82,17 @@ def canned(cmd):
 			try:
 				name, text = split[1].split(' ', 1)
 			except IndexError:
-				cmd.reply('%s: missing args to `set`; %s' % (cmd.sender['username'], can_usage))
+				cmd.reply('%s: missing args to `set`; %s' % (cmd.sender['pretty_name'], can_usage))
 				return
 			except ValueError:
-				cmd.reply('%s: must specify can name and text' % cmd.sender['username'])
+				cmd.reply('%s: must specify can name and text' % cmd.sender['pretty_name'])
 				return
 			_can_set(cmd, name, text)
 		elif subcmd == 'del':
 			try:
 				name = split[1]
 			except IndexError:
-				cmd.reply('%s: missing args to `del`; %s' % (cmd.sender['username'], can_usage))
+				cmd.reply('%s: missing args to `del`; %s' % (cmd.sender['pretty_name'], can_usage))
 				return
 			_can_del(cmd, name)
 		else:
diff --git a/code_eval.py b/code_eval.py
index c24db85..8b6f33b 100644
--- a/code_eval.py
+++ b/code_eval.py
@@ -113,7 +113,7 @@ def reply(cmd, output):
 	output = output[:500]
 	if len(split) == 11:
 		output += '\n(too many output lines)'
-	message = cmd.sender['username'] + ':'
+	message = cmd.sender['pretty_name'] + ':'
 	output = '```\n%s```' % output
 	embed = {'description': output}
 	cmd.reply(message, embed)
diff --git a/eve.py b/eve.py
index 40821a1..f6edfcb 100644
--- a/eve.py
+++ b/eve.py
@@ -244,12 +244,12 @@ def get_group_actives(entity_id, entity_type):
 				json=[cmd.args])
 		r.raise_for_status()
 	except requests.exceptions.HTTPError:
-		cmd.reply('{}: esi error'.format(cmd.sender['username']))
+		cmd.reply('{}: esi error'.format(cmd.sender['pretty_name']))
 		return
 
 	initial_id = r.json()
 	if len(initial_id) == 0:
-		cmd.reply("%s: couldn't find your sleazebag" % cmd.sender['username'])
+		cmd.reply("%s: couldn't find your sleazebag" % cmd.sender['pretty_name'])
 		return
 
 	corp_id = alliance_id = None
@@ -258,7 +258,7 @@ def get_group_actives(entity_id, entity_type):
 		try:
 			char_info, killed, lost = get_char_info(initial_id['characters'][0]['id'])
 		except requests.exceptions.HTTPError:
-			cmd.reply("%s: couldn't find your sleazebag" % cmd.sender['username'])
+			cmd.reply("%s: couldn't find your sleazebag" % cmd.sender['pretty_name'])
 
 		corp_id = char_info['corporation_id']
 		output += '{name} ({security:.2f}) [{killed}/{lost}]\n'.format(
diff --git a/friend_code.py b/friend_code.py
index d11690f..ebd83f2 100644
--- a/friend_code.py
+++ b/friend_code.py
@@ -81,6 +81,6 @@ def _user_remove(cmd):
 		''', (cmd.sender['id'],))
 
 	if cur.rowcount:
-		cmd.reply('Successfully removed friend code for %s.' % (cmd.sender['username']))
+		cmd.reply('Successfully removed friend code for %s.' % (cmd.sender['pretty_name']))
 	else:
 		cmd.reply('No friend code removed. Have you registered?')
diff --git a/reddit.py b/reddit.py
index 5ad85ae..d10b79b 100644
--- a/reddit.py
+++ b/reddit.py
@@ -20,7 +20,7 @@ def headpat(cmd):
 			'image': {'url': image_url, 'width': image['width'], 'height': image['height']},
 		}
 	except Exception:
-		cmd.reply('%s: error getting an /r/headpat image' % cmd.sender['username'])
+		cmd.reply('%s: error getting an /r/headpat image' % cmd.sender['pretty_name'])
 	else:
 		cmd.reply('', embed)
 
diff --git a/timer.py b/timer.py
index 07b0266..f872a36 100644
--- a/timer.py
+++ b/timer.py
@@ -55,7 +55,7 @@ def timer(cmd):
 			name = options[0]['options'][0]['value']
 			_timer_del(cmd, name)
 		else:
-			raise AssertionError('unexpeced timer sub-command: %r' % subcmd)
+			raise AssertionError('unexpected timer sub-command: %r' % subcmd)
 	else:
 		if not cmd.args:
 			cmd.reply(timer_usage)
@@ -68,17 +68,17 @@ def timer(cmd):
 			try:
 				name, arg = split[1].rsplit(' in ', 1)
 			except IndexError:
-				cmd.reply('%s: missing args to `add`; %s' % (cmd.sender['username'], timer_usage))
+				cmd.reply('%s: missing args to `add`; %s' % (cmd.sender['pretty_name'], timer_usage))
 				return
 			except ValueError:
-				cmd.reply('%s: must specify timer name and time delta' % cmd.sender['username'])
+				cmd.reply('%s: must specify timer name and time delta' % cmd.sender['pretty_name'])
 				return
 			_timer_add(cmd, name, arg)
 		elif subcmd == 'del':
 			try:
 				name = split[1]
 			except IndexError:
-				cmd.reply('%s: missing args to `del`; %s' % (cmd.sender['username'], timer_usage))
+				cmd.reply('%s: missing args to `del`; %s' % (cmd.sender['pretty_name'], timer_usage))
 				return
 			_timer_del(cmd, name)
 		else:
@@ -98,7 +98,7 @@ def _timer_add(cmd, name, arg):
 	timers = config.state.timers.get(cmd.channel_id, {})
 	if name in timers:
 		time_str = format_dt(timers[name].replace(tzinfo=datetime.timezone.utc))
-		cmd.reply('%s: "%s" already set for %s' % (cmd.sender['username'], name, time_str))
+		cmd.reply('%s: "%s" already set for %s' % (cmd.sender['pretty_name'], name, time_str))
 		return
 
 	try: # parse as timestamp (981173106)
@@ -108,7 +108,7 @@ def _timer_add(cmd, name, arg):
 		try:
 			dt = parse_rel(arg)
 		except RelativeTimeParsingException as e:
-			cmd.reply('%s: %s' % (cmd.sender['username'], e.message))
+			cmd.reply('%s: %s' % (cmd.sender['pretty_name'], e.message))
 			return
 	dt = dt.replace(tzinfo=datetime.timezone.utc)
 
@@ -125,7 +125,7 @@ def _timer_del(cmd, name):
 		config.state.save()
 		cmd.reply('deleted "%s"' % name)
 	except KeyError:
-		cmd.reply('%s: couldn\'t find "%s" in this channel' % (cmd.sender['username'], name))
+		cmd.reply('%s: couldn\'t find "%s" in this channel' % (cmd.sender['pretty_name'], name))
 
 def format_dt(dt):
 	ts = dt.timestamp()
diff --git a/utils.py b/utils.py
index 3ca31ac..b669b6b 100644
--- a/utils.py
+++ b/utils.py
@@ -22,7 +22,7 @@
 def help(cmd):
 	if cmd.args: # only reply on "!help"
 		return
-	commands = set(cmd.bot.commands.keys())
+	commands = list(cmd.bot.commands.keys())
 	guild_id = cmd.bot.channels[cmd.channel_id]
 	if config.bot.roles is None or guild_id != config.bot.roles['server']:
 		for name, func in cmd.bot.commands.items():
@@ -128,7 +128,7 @@ def roll(cmd):
 		result = split[1].split('=', 1)[1]
 		cmd.reply('%s %s' % (result, details))
 	except IndexError:
-		cmd.reply('%s: error rolling' % cmd.sender['username'])
+		cmd.reply('%s: error rolling' % cmd.sender['pretty_name'])
 
 tzinfos = {
 	'PST': dateutil.tz.gettz('America/Los_Angeles'),
@@ -174,7 +174,7 @@ def weather(cmd):
 		response = rs.get(url)
 		response.raise_for_status()
 	except Exception:
-		cmd.reply('%s: error getting weather at %s' % (cmd.sender['username'], url),
+		cmd.reply('%s: error getting weather at %s' % (cmd.sender['pretty_name'], url),
 				{'description': '```%s```' % traceback.format_exc()[-500:]})
 		return
 	cmd.reply(None, files={'weather.png': response.content})