Therese Sigrid von Philip

Therese Sigrid von Philip (フィリップによるテレーズシグリッド, Firippu ni yoru terēzushiguriddo) was a Northern Duchess and one of the seven prince-electors of the Urquhart Holy Empire until she renounced her peerage and followed Wend back to the Helmut Kingdom. She became his mistress before becoming his wife.

Appearance
With a height of around 170 cm, she is a characteristically sensual beauty with a dark brown, smooth skin and she seems to be from  Urquhart Holy Empire which is a multiracial nation.

Having her dark blonde hair extend down to her shoulders, her breasts don’t lose to those of Elise.

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.

Background
She is first introduced as an Ambassador whose role is to oversee the Friendship Visit Group from the Helmut Kingdom during their time in the Empire. She became the heir to the Philip house over her brothers due to her having darker skin color. In the Phillip household this takes precedence over age or sex.

Plot
When Wend's group came for the Friendship Visit Group meeting she was the hostess for his group. From the very beginning she was attracted to Wend and every night she would attempt to come to his room and sleep with him. The first time she was already in his room, the second time Elise and the other wives figured out what she was up to and decided that Wend will sleep together with all his wives in the same room going forward. When the civil war started Duke Nürnberg attempted to kill her will magicians, but Wend killed them all. Wend and his group traveled with her to the Mizuho Territory seeking allies as they knew that Duke Nürnberg wanted to killed everyone that wasn't part of his race. During the civil war Wend assisted Peter to take down Duke Nürnberg and his army. Wend siding with Peter caused him to oppose Therese, but after the war she had no ill will towards Wend. Once she was given the option to step own from her position and follow Wend back to the Helmut Kingdom, she happily accepted.

She moved into a mansion on Wendelin von Benno Baumeister territory next to his mansion. After this she was accepted by Wend's other wives as before they were worried about her status as a Duke and didn't want her to usurp their position in the marriage. She started coming over to his mansion everyday and kept inviting him to come and visit her at night, but he always declined. One night he decided to visit her and they slept together. After this she tested her mana together with Amalie Mainbach and it revealed a rainbow color. Brantark Ringstat was present when this happened and told Wend “You really didn’t wait long to make a move on her, did you?”  She would become part of the second group of Wends wives to get pregnant, even though she wasn't his wife at the time. Even though she had made the comment that she had no desire to married and just wanted to have children, she was very happy when Wend took her as one of his wives.

Abilities & Skills
Her magic powers were not unlocked till she had sex with Wend.

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.

Powers

 * 『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.

Skills
She is an excellent noble and politician. Both Wend and Rhodrich seek her out for advice when dealing with nobles.

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.
 * When she comes to the Helmut Kingdom with Wend everyone assumes that she is his lover and spoils of war.
 * Like all Wend's children, her two children were born magicians.
 * When Wend came for the Friendship Visit, so put Wend's wives in separate rooms so she could try to seduce him.
 * She get her skin tone from the Run race, which is the major ethnic group of the north.
 * She becomes pregnant in Volume 14 Chapter 8
 * The rumor about her and Wend:It has. It’s said that Earl Baumeister-sama, who played a big role during the Empire’s civil war, received the former Duchess Philip-sama, a rival of the new emperor, as spoils of war and is sheltering her.”