Therese Sigrid von Philip

Therese Sigrid von Philip is a Northern Duchess and one of the seven prince-electors of the Holy Empire Urquhart.

Appearance
Therese Sigrid von Phillip is an attractive woman with long blond hair and blue eyes. According the the novels, she has a darker complexion, which is a common trait among the leaders of the Phillip Household.

Personality
She is a very stubborn person who is well respected within her own domain after going through various circumstances. She is also quite fond of Earl Baumeister to the point of openly flirting and teasing him in front of his wives. She genuinely ends up in love with Wendelin even though he rebukes her every time.

Synopsis
She is first introduced as an Ambassador whose role is to oversee the Friendship Group from the Helmut Kingdom during their time in the Empire.

Abilities

 * Bureaucratic Skills as she is seen handling a large amount of military and government documents during her time as the Supreme Commander of the Liberation Army during the Rebellion Arc of the Light Novel.
 * She has also displayed good Leadership Skills despite the mix of Feudal Armies under her command.
 * 『Fireball**』: a fire attribute-based offensive spell which she gains shortly after she becomes one of Wendelin's mistresses.
 * 『Lightning**』: an offensive spell which shocks and stuns her opponents with bolts of electricity. She uses this to great effect in the Akitsushima arc.
 * 『Earth Wall**』: an earth attribute-based attack/defense spell that generates near-infinite layers of earthen barriers radiating from a central point; she learns this from Wend, who suggests that she apply the concept of an "onion" to it.

Wendelin von Benno Baumeister
When they first met, she was very forward and open about her pursuit of him and didn't relent even when his wives kept blocking her. Eventually Wend and his wives relent and she becomes another wife.

Brothers
During the Civil War her brothers attempted to kill Wend with poison but since he doesn't like alcohol he didn't drink the wine. When they thought he was dead they attempted to place her under house arrest and Erwin von Arnim called out to Wend who used his Wind Blades to restain their neck, hands, arms and legs. Wend told them not to move but they did anyway and lost their hands. They eventually committed suicide by drinking poisoned wine, along with their mother, given to them by their cousin Alfons who was to become the new head of the Phillip  household, allowing Therese to retire and pursue Wend.

Trivia

 * Similar to Iina, Therese seems to have developed a special affinity for fire attribute magic after she "unlocks" her magical potential with Wendelin's help. Though she's a novice, her skill level and mana capacity is estimated to be at least intermediate level - this makes her the least powerful magic user in the harem, but is still a force to be reckoned with. By the time of the Akitsushima arc, her abilities had already been raised to the "advanced" level (albeit slightly lower than Lisa's and Katharina's).
 * During the course of her mana development training with Brantark, Therese receives a specially-made wand from Wendelin as a gift, which she subsequently uses in her duel with Lisa (Vol. 13).
 * Therese spends a lot of her time with Amalie and Lisa; the three of them also happen to be the oldest members of Wendelin's harem as well.
 * Wend trusts Therese's advice the most, especially when it comes to socio-political concerns.
 * As the former head of the Duke Philip household and as a military commander during the Civil War, Therese knows how to wield a sword and has actually used it in battle --- especially during the time when she and her bodyguards tried to make a "last stand" against the assassins who were trying to kill her, prior to being rescued by Wend's group.
 * When Wend was summoning the fish from the northern sea, it was her underwear that he also summoned and when he came to visit during the Friendship Visit Group she started to question him about it as she suspected it was him that did the deed.